Proper Format to Play from Forked-Daapd?

What is the proper format to play a play from the forked-daapd integration? I have tried the following:

entity_id: media_player.living_room_chromecast
media_content_id: 'Music'
media_content_type: music
entity_id: media_player.living_room_chromecast
media_content_id: 'Music'
media_content_type: playlist

And have tried different combinations of '&Music&' & 'Music'