Adds a generator to a playlist, same parameters as the POST to create. With a dumb playlist, this adds the specified items to the playlist.
With a smart playlist, passing a new uri
parameter replaces the rules for the playlist. Returns the playlist.
Plex Authentication Token
the ID of the playlist
the content URI for the playlist
"server://12345/com.plexapp.plugins.library/library/metadata/1"
the play queue to add to a playlist
123
Playlist Updated
The response is of type object
.