Creating a simple BBC 2 Radio lovelace panel

I’m trying to create a very simple lovelace panel using the mini-media-player HACS component. But am getting no output. Here’s my code:

type: custom:mini-media-player
entity: media_player.googlehome0851
artwork: cover
source: icon
  volume: true
toggle_power: true
volume_stateless: true
group: false
sound_mode: icon
  columns: 4
    - name: BBC Radio 2
      type: music
      id: >-

Clearly I’m doing something wrong but I cannot see what.