Добавьте файлы проекта.

YandexMusic.API/Models/Playlist/YPlaylistMadeFor.cs

@@ -0,0 +1,28 @@
+using YandexMusic.API.Models.Common;
+
+namespace YandexMusic.API.Models.Playlist
+{
+    public class YPlaylistMadeFor
+    {
+        public class YMadeForCaseForms
+        {
+            #region Свойства
+
+            public string Accusative { get; set; }
+            public string Dative { get; set; }
+            public string Genitive { get; set; }
+            public string Instrumental { get; set; }
+            public string Nominative { get; set; }
+            public string Prepositional { get; set; }
+
+            #endregion Свойства
+        }
+
+        #region Свойства
+
+        public YMadeForCaseForms CaseForms { get; set; }
+        public YOwner UserInfo { get; set; }
+
+        #endregion Свойства
+    }
+}