diff --git a/yandex_music/landing/block.py b/yandex_music/landing/block.py
index 07158ba..9405474 100644
--- a/yandex_music/landing/block.py
+++ b/yandex_music/landing/block.py
@@ -1,7 +1,7 @@
-from typing import TYPE_CHECKING, Optional, List
+from typing import TYPE_CHECKING, Optional, List, Union
 
 if TYPE_CHECKING:
-    from yandex_music import Client
+    from yandex_music import Client, BlockEntity, PersonalPlaylistsData, PlayContextsData
 
 from yandex_music import YandexMusicObject
 
@@ -12,9 +12,9 @@ class Block(YandexMusicObject):
                  type_,
                  type_for_from,
                  title,
-                 entities,
+                 entities: List['BlockEntity'],
                  description=None,
-                 data=None,
+                 data: Optional[Union[PersonalPlaylistsData, PlayContextsData]] = None,
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
 
@@ -30,11 +30,11 @@ class Block(YandexMusicObject):
         self.client = client
         self._id_attrs = (self.id, self.type, self.type_for_from, self.title, self.entities)
 
-    def __getitem__(self, item):
+    def __getitem__(self, item: int) -> 'BlockEntity':
         return self.entities[item]
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['Block']:
         if not data:
             return None
 
@@ -51,7 +51,7 @@ class Block(YandexMusicObject):
         return cls(client=client, **data)
 
     @classmethod
-    def de_list(cls, data: dict, client: 'Client'):
+    def de_list(cls, data: dict, client: 'Client') -> List['Block']:
         if not data:
             return []
 
diff --git a/yandex_music/landing/block_entity.py b/yandex_music/landing/block_entity.py
index b87a0b8..5a7304d 100644
--- a/yandex_music/landing/block_entity.py
+++ b/yandex_music/landing/block_entity.py
@@ -1,4 +1,4 @@
-from typing import TYPE_CHECKING, Optional, List
+from typing import TYPE_CHECKING, Optional, List, Union
 
 if TYPE_CHECKING:
     from yandex_music import Client
@@ -21,8 +21,9 @@ de_json = {
 class BlockEntity(YandexMusicObject):
     def __init__(self,
                  id_,
-                 type_,
-                 data,
+                 type_: str,
+                 data: Optional[Union['GeneratedPlaylist', 'Promotion', 'Album',
+                                      'Playlist', 'ChartItem', 'PlayContext', 'MixLink']],
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
 
@@ -34,7 +35,7 @@ class BlockEntity(YandexMusicObject):
         self._id_attrs = (self.id, self.type, self.data)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['BlockEntity']:
         if not data:
             return None
 
@@ -44,7 +45,7 @@ class BlockEntity(YandexMusicObject):
         return cls(client=client, **data)
 
     @classmethod
-    def de_list(cls, data: dict, client: 'Client'):
+    def de_list(cls, data: dict, client: 'Client') -> List['BlockEntity']:
         if not data:
             return []
 
diff --git a/yandex_music/landing/chart.py b/yandex_music/landing/chart.py
index 7aea861..196fdec 100644
--- a/yandex_music/landing/chart.py
+++ b/yandex_music/landing/chart.py
@@ -1,7 +1,7 @@
 from typing import TYPE_CHECKING, Optional, List
 
 if TYPE_CHECKING:
-    from yandex_music import Client
+    from yandex_music import Client, TrackId
 
 from yandex_music import YandexMusicObject
 
@@ -12,7 +12,7 @@ class Chart(YandexMusicObject):
                  progress,
                  listeners,
                  shift,
-                 track_id=None,
+                 track_id: Optional['TrackId'] = None,
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
         self.position = position
@@ -26,7 +26,7 @@ class Chart(YandexMusicObject):
         self._id_attrs = (self.position, self.progress, self.listeners, self.shift, self.track_id)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['Chart']:
         """Десериализация объекта.
 
         Args:
@@ -48,7 +48,7 @@ class Chart(YandexMusicObject):
         return cls(client=client, **data)
 
     @classmethod
-    def de_list(cls, data: dict, client: 'Client'):
+    def de_list(cls, data: dict, client: 'Client') -> List['Chart']:
         """Десериализация списка объектов.
 
         Args:
diff --git a/yandex_music/landing/chart_item.py b/yandex_music/landing/chart_item.py
index b776c54..926b983 100644
--- a/yandex_music/landing/chart_item.py
+++ b/yandex_music/landing/chart_item.py
@@ -1,15 +1,15 @@
 from typing import TYPE_CHECKING, Optional, List
 
 if TYPE_CHECKING:
-    from yandex_music import Client
+    from yandex_music import Client, Track, Chart
 
 from yandex_music import YandexMusicObject
 
 
 class ChartItem(YandexMusicObject):
     def __init__(self,
-                 track,
-                 chart,
+                 track: Optional['Track'],
+                 chart: Optional['Chart'],
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
         self.track = track
@@ -19,7 +19,7 @@ class ChartItem(YandexMusicObject):
         self._id_attrs = (self.track, self.chart)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['ChartItem']:
         if not data:
             return None
 
@@ -31,7 +31,7 @@ class ChartItem(YandexMusicObject):
         return cls(client=client, **data)
 
     @classmethod
-    def de_list(cls, data: dict, client: 'Client'):
+    def de_list(cls, data: dict, client: 'Client') -> List['ChartItem']:
         if not data:
             return []
 
diff --git a/yandex_music/landing/mix_link.py b/yandex_music/landing/mix_link.py
index 0bb3012..4c9eb8a 100644
--- a/yandex_music/landing/mix_link.py
+++ b/yandex_music/landing/mix_link.py
@@ -29,7 +29,7 @@ class MixLink(YandexMusicObject):
         self._id_attrs = (self.url, self.title, self.url_scheme, self.text_color,
                           self.background_color, self.background_image_uri, self.cover_white)
 
-    def download_background_image(self, filename, size='200x200'):
+    def download_background_image(self, filename: str, size: str = '200x200') -> None:
         """Загрузка заднего фона.
 
         Args:
@@ -40,7 +40,7 @@ class MixLink(YandexMusicObject):
         self.client.request.download(f'https://{self.background_image_uri.replace("%%", size)}', filename)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['MixLink']:
         if not data:
             return None
 
@@ -49,7 +49,7 @@ class MixLink(YandexMusicObject):
         return cls(client=client, **data)
 
     @classmethod
-    def de_list(cls, data: dict, client: 'Client'):
+    def de_list(cls, data: dict, client: 'Client') -> List['MixLink']:
         if not data:
             return []
 
diff --git a/yandex_music/landing/personal_playlists_data.py b/yandex_music/landing/personal_playlists_data.py
index 4980d90..4d57775 100644
--- a/yandex_music/landing/personal_playlists_data.py
+++ b/yandex_music/landing/personal_playlists_data.py
@@ -8,7 +8,7 @@ from yandex_music import YandexMusicObject
 
 class PersonalPlaylistsData(YandexMusicObject):
     def __init__(self,
-                 is_wizard_passed,
+                 is_wizard_passed: bool,
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
         self.is_wizard_passed = is_wizard_passed
@@ -17,7 +17,7 @@ class PersonalPlaylistsData(YandexMusicObject):
         self._id_attrs = (self.is_wizard_passed,)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['PersonalPlaylistsData']:
         if not data:
             return None
 
diff --git a/yandex_music/landing/play_context.py b/yandex_music/landing/play_context.py
index bd945c4..6f69bdb 100644
--- a/yandex_music/landing/play_context.py
+++ b/yandex_music/landing/play_context.py
@@ -1,7 +1,7 @@
 from typing import TYPE_CHECKING, Optional, List
 
 if TYPE_CHECKING:
-    from yandex_music import Client
+    from yandex_music import Client, TrackShortOld
 
 from yandex_music import YandexMusicObject
 
@@ -11,7 +11,7 @@ class PlayContext(YandexMusicObject):
                  client_,
                  context,
                  context_item,
-                 tracks,
+                 tracks: List['TrackShortOld'],
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
         self.client_ = client_
@@ -23,7 +23,7 @@ class PlayContext(YandexMusicObject):
         self._id_attrs = (self.client_, self.context_item, self.context_item, self.tracks)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['PlayContext']:
         if not data:
             return None
 
diff --git a/yandex_music/landing/play_contexts_data.py b/yandex_music/landing/play_contexts_data.py
index 0145326..ce469d2 100644
--- a/yandex_music/landing/play_contexts_data.py
+++ b/yandex_music/landing/play_contexts_data.py
@@ -1,14 +1,14 @@
 from typing import TYPE_CHECKING, Optional, List
 
 if TYPE_CHECKING:
-    from yandex_music import Client
+    from yandex_music import Client, TrackShortOld
 
 from yandex_music import YandexMusicObject
 
 
 class PlayContextsData(YandexMusicObject):
     def __init__(self,
-                 other_tracks,
+                 other_tracks: List['TrackShortOld'],
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
         self.other_tracks = other_tracks
@@ -17,7 +17,7 @@ class PlayContextsData(YandexMusicObject):
         self._id_attrs = (self.other_tracks,)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['PlayContextsData']:
         if not data:
             return None
 
diff --git a/yandex_music/landing/promotion.py b/yandex_music/landing/promotion.py
index 2f65d22..19450da 100644
--- a/yandex_music/landing/promotion.py
+++ b/yandex_music/landing/promotion.py
@@ -34,7 +34,7 @@ class Promotion(YandexMusicObject):
                           self.url, self.url_scheme, self.text_color, self.gradient, self.image)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['Promotion']:
         if not data:
             return None
 
@@ -43,7 +43,7 @@ class Promotion(YandexMusicObject):
         return cls(client=client, **data)
 
     @classmethod
-    def de_list(cls, data: dict, client: 'Client'):
+    def de_list(cls, data: dict, client: 'Client') -> List['Promotion']:
         if not data:
             return []
 
diff --git a/yandex_music/landing/track_id.py b/yandex_music/landing/track_id.py
index 590361e..ec9287c 100644
--- a/yandex_music/landing/track_id.py
+++ b/yandex_music/landing/track_id.py
@@ -19,7 +19,7 @@ class TrackId(YandexMusicObject):
         self._id_attrs = (self.id, self.album_id)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['TrackId']:
         if not data:
             return None
 
diff --git a/yandex_music/landing/track_short_old.py b/yandex_music/landing/track_short_old.py
index 9f06616..2971638 100644
--- a/yandex_music/landing/track_short_old.py
+++ b/yandex_music/landing/track_short_old.py
@@ -1,14 +1,14 @@
 from typing import TYPE_CHECKING, Optional, List
 
 if TYPE_CHECKING:
-    from yandex_music import Client
+    from yandex_music import Client, TrackId
 
 from yandex_music import YandexMusicObject
 
 
 class TrackShortOld(YandexMusicObject):
     def __init__(self,
-                 track_id,
+                 track_id: Optional['TrackId'],
                  timestamp,
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
@@ -19,7 +19,7 @@ class TrackShortOld(YandexMusicObject):
         self._id_attrs = (self.track_id,)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['TrackShortOld']:
         if not data:
             return None
 
@@ -30,7 +30,7 @@ class TrackShortOld(YandexMusicObject):
         return cls(client=client, **data)
 
     @classmethod
-    def de_list(cls, data: dict, client: 'Client'):
+    def de_list(cls, data: dict, client: 'Client') -> List['TrackShortOld']:
         if not data:
             return []
 
diff --git a/yandex_music/likes/albums_likes.py b/yandex_music/likes/albums_likes.py
index 6c27533..8701146 100644
--- a/yandex_music/likes/albums_likes.py
+++ b/yandex_music/likes/albums_likes.py
@@ -1,7 +1,7 @@
 from typing import TYPE_CHECKING, Optional, List
 
 if TYPE_CHECKING:
-    from yandex_music import Client
+    from yandex_music import Client, Album
 
 from yandex_music import YandexMusicObject
 
@@ -10,7 +10,7 @@ class AlbumsLikes(YandexMusicObject):
     def __init__(self,
                  timestamp,
                  id_=None,
-                 album=None,
+                 album: Optional['Album'] = None,
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
         self.id = id_
@@ -21,7 +21,7 @@ class AlbumsLikes(YandexMusicObject):
         self._id_attrs = (self.id, self.album)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['AlbumsLikes']:
         if not data:
             return None
 
@@ -32,7 +32,7 @@ class AlbumsLikes(YandexMusicObject):
         return cls(client=client, **data)
 
     @classmethod
-    def de_list(cls, data: dict, client: 'Client'):
+    def de_list(cls, data: dict, client: 'Client') -> List['AlbumsLikes']:
         if not data:
             return []
 
diff --git a/yandex_music/likes/artists_likes.py b/yandex_music/likes/artists_likes.py
index 488cc95..28ee261 100644
--- a/yandex_music/likes/artists_likes.py
+++ b/yandex_music/likes/artists_likes.py
@@ -1,7 +1,7 @@
 from typing import TYPE_CHECKING, Optional, List
 
 if TYPE_CHECKING:
-    from yandex_music import Client
+    from yandex_music import Client, Artist
 
 from yandex_music import YandexMusicObject
 
@@ -9,7 +9,7 @@ from yandex_music import YandexMusicObject
 class ArtistsLikes(YandexMusicObject):
     def __init__(self,
                  id_=None,
-                 artist=None,
+                 artist: Optional['Artist'] = None,
                  timestamp=None,
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
@@ -21,7 +21,7 @@ class ArtistsLikes(YandexMusicObject):
         self._id_attrs = (self.id, self.artist)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['ArtistsLikes']:
         if not data:
             return None
 
@@ -37,7 +37,7 @@ class ArtistsLikes(YandexMusicObject):
         return cls(client=client, **data)
 
     @classmethod
-    def de_list(cls, data: dict, client: 'Client'):
+    def de_list(cls, data: dict, client: 'Client') -> List['ArtistsLikes']:
         if not data:
             return []
 
diff --git a/yandex_music/likes/playlists_likes.py b/yandex_music/likes/playlists_likes.py
index 3b9946f..7677d21 100644
--- a/yandex_music/likes/playlists_likes.py
+++ b/yandex_music/likes/playlists_likes.py
@@ -1,7 +1,7 @@
 from typing import TYPE_CHECKING, Optional, List
 
 if TYPE_CHECKING:
-    from yandex_music import Client
+    from yandex_music import Client, Playlist
 
 from yandex_music import YandexMusicObject
 
@@ -10,7 +10,7 @@ class PlaylistsLikes(YandexMusicObject):
     def __init__(self,
                  timestamp,
                  id_=None,
-                 playlist=None,
+                 playlist: Optional['Playlist'] = None,
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
         self.id = id_
@@ -21,7 +21,7 @@ class PlaylistsLikes(YandexMusicObject):
         self._id_attrs = (self.id, self.playlist)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['PlaylistsLikes']:
         if not data:
             return None
 
@@ -32,7 +32,7 @@ class PlaylistsLikes(YandexMusicObject):
         return cls(client=client, **data)
 
     @classmethod
-    def de_list(cls, data: dict, client: 'Client'):
+    def de_list(cls, data: dict, client: 'Client') -> List['PlaylistsLikes']:
         if not data:
             return []
 
diff --git a/yandex_music/playlist/case_forms.py b/yandex_music/playlist/case_forms.py
index 43732d5..838d13a 100644
--- a/yandex_music/playlist/case_forms.py
+++ b/yandex_music/playlist/case_forms.py
@@ -28,7 +28,7 @@ class CaseForms(YandexMusicObject):
                           self.accusative, self.instrumental, self.prepositional)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['CaseForms']:
         if not data:
             return None
 
diff --git a/yandex_music/playlist/made_for.py b/yandex_music/playlist/made_for.py
index bb5d57b..b6d1cf9 100644
--- a/yandex_music/playlist/made_for.py
+++ b/yandex_music/playlist/made_for.py
@@ -1,15 +1,15 @@
 from typing import TYPE_CHECKING, Optional
 
 if TYPE_CHECKING:
-    from yandex_music import Client
+    from yandex_music import Client, User, CaseForms
 
 from yandex_music import YandexMusicObject
 
 
 class MadeFor(YandexMusicObject):
     def __init__(self,
-                 user_info,
-                 case_forms,
+                 user_info: Optional['User'],
+                 case_forms: Optional['CaseForms'],
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
         self.user_info = user_info
@@ -19,7 +19,7 @@ class MadeFor(YandexMusicObject):
         self._id_attrs = (self.user_info, self.case_forms)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['MadeFor']:
         if not data:
             return None
 
diff --git a/yandex_music/playlist/play_counter.py b/yandex_music/playlist/play_counter.py
index efceae2..c5703c3 100644
--- a/yandex_music/playlist/play_counter.py
+++ b/yandex_music/playlist/play_counter.py
@@ -21,7 +21,7 @@ class PlayCounter(YandexMusicObject):
         self._id_attrs = (self.value, self.description, self.updated)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['PlayCounter']:
         if not data:
             return None
 
diff --git a/yandex_music/playlist/playlist_absence.py b/yandex_music/playlist/playlist_absence.py
index 3aaec71..3290cbb 100644
--- a/yandex_music/playlist/playlist_absence.py
+++ b/yandex_music/playlist/playlist_absence.py
@@ -24,8 +24,8 @@ class PlaylistAbsence(YandexMusicObject):
     """
 
     def __init__(self,
-                 kind,
-                 reason,
+                 kind: int,
+                 reason: str,
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
         self.kind = kind
@@ -35,7 +35,7 @@ class PlaylistAbsence(YandexMusicObject):
         self._id_attrs = (self.kind, self.reason)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['PlaylistAbsence']:
         """Десериализация объекта.
 
         Args:
diff --git a/yandex_music/playlist/playlist_id.py b/yandex_music/playlist/playlist_id.py
index 65a8af5..871d5b7 100644
--- a/yandex_music/playlist/playlist_id.py
+++ b/yandex_music/playlist/playlist_id.py
@@ -19,7 +19,7 @@ class PlaylistId(YandexMusicObject):
         self._id_attrs = (self.uid, self.kind)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['PlaylistId']:
         """Десериализация объекта.
 
         Args:
@@ -39,7 +39,7 @@ class PlaylistId(YandexMusicObject):
         return cls(client=client, **data)
 
     @classmethod
-    def de_list(cls, data: dict, client: 'Client'):
+    def de_list(cls, data: dict, client: 'Client') -> List['PlaylistId']:
         """Десериализация списка объектов.
 
         Args:
diff --git a/yandex_music/playlist/user.py b/yandex_music/playlist/user.py
index a019a13..14ac693 100644
--- a/yandex_music/playlist/user.py
+++ b/yandex_music/playlist/user.py
@@ -15,7 +15,8 @@ class User(YandexMusicObject):
         name (:obj:`str`): Имя пользователя.
         sex (:obj:`str`): Пол пользователя.
         verified (:obj:`bool`): Участвует ли пользователь в генерации плейлистов дня и т.д., и т.п.
-        client (:obj:`yandex_music.Client`): Объект класса :class:`yandex_music.Client` представляющий клиент Yandex Music.
+        client (:obj:`yandex_music.Client`): Объект класса :class:`yandex_music.Client` представляющий клиент Yandex
+            Music.
 
     Args:
         uid (:obj:`int`): Идентификатор пользователя.
@@ -23,16 +24,17 @@ class User(YandexMusicObject):
         name (:obj:`str`): Имя пользователя.
         sex (:obj:`str`): Пол пользователя.
         verified (:obj:`bool`): Участвует ли пользователь в генерации плейлистов дня и т.д., и т.п.
-        client (:obj:`yandex_music.Client`, optional): Объект класса :class:`yandex_music.Client` представляющий клиент Yandex Music.
+        client (:obj:`yandex_music.Client`, optional): Объект класса :class:`yandex_music.Client` представляющий клиент
+            Yandex Music.
         **kwargs: Произвольные ключевые аргументы полученные от API.
     """
 
     def __init__(self,
-                 uid,
-                 login,
-                 name,
-                 sex,
-                 verified,
+                 uid: int,
+                 login: str,
+                 name: str,
+                 sex: str,
+                 verified: bool,
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
         self.uid = uid
@@ -44,7 +46,7 @@ class User(YandexMusicObject):
         self.client = client
         self._id_attrs = (self.uid, self.login)
 
-    def download_avatar(self, filename, format_='normal'):
+    def download_avatar(self, filename: str, format_: str = 'normal') -> None:
         """Загрузка изображения пользователя.
 
         Args:
@@ -55,7 +57,7 @@ class User(YandexMusicObject):
         self.client.request.download(f'https://upics.yandex.net/{self.uid}/{format_}', filename)
 
     @classmethod
-    def de_json(cls, data: dict, client: 'Client'):
+    def de_json(cls, data: dict, client: 'Client') -> Optional['User']:
         """Десериализация объекта.
 
         Args: