message: use enum instead of full track
diff: @@ -5,9 +5,8 @@ use std::collections::HashMap;
  use super::image::Image;
  use super::page::Page;
  -use super::track::FullTrack;
  use super::user::PublicUser;
  -use crate::model::{Followers, Type};
  +use crate::model::{Followers, Type, PlayingItem};
  /// Playlist result object
  ///
  @@ -76,7 +75,7 @@ pub struct PlaylistItem {
  pub added_at: Option<DateTime<Utc>>,
  pub added_by: Option<PublicUser>,
  pub is_local: bool,
  - pub track: Option<FullTrack>,
  + pub track: Option<PlayingItem>,
  }
  /// Featured playlists object
  /// [Reference](https://developer.spotify.com/documentation/web-api/reference/#endpoint-get-featured-playlists)
  