Update signature

src/helpers.cr

@@ -243,15 +243,12 @@ end
 def decrypt_signature(a)
   a = a.split("")
 
-  a = splice(a, 12)
-  a = splice(a, 18)
   a.reverse!
+  a.delete_at(0..1)
+  a = splice(a, 67)
   a.delete_at(0..2)
   a.reverse!
   a.delete_at(0..2)
-  a = splice(a, 69)
-  a.reverse!
-  a.delete_at(0..2)
 
   return a.join("")
 end