Optionalclient: ClientThe owning client, stored for later convenience calls.
OptionalclientThe client that created this model, used by convenience methods.
OptionalplaylistStable UUID of the backing playlist (the "Liked tracks" playlist).
OptionalrevisionLibrary revision.
OptionaltracksThe track references.
OptionaluidOwner uid.
A revisioned list of track references (the user's liked/disliked library).