Help with shortcut button to run a service

[snorrebot]

Hi all,

I am desperately looking for a solution. I want to use a shortcut button on my mini media player to run the media_player.play_media service to play a radio station url. What am I doing wrong?
I get the following error: cannot run service media_player/play_media. Must contain at least one of entity_id, device_id, area_id

Thanks a lot for helping me out! Lovelace card yaml:

`type: vertical-stack
cards:

• type: custom:mini-media-player
  entity: media_player.keuken
  source: icon
  info: short
  artwork: cover
  hide:
  icon: true
  name: Keuken
  shortcuts:
  columns: 3
  buttons:
  - name: Klara
  entity_id: media_player.keuken
  type: service
  id: media_player.play_media
  data:
  media_content_type: music
  media_content_id: http://icecast.vrtcdn.be/klara-high.mp3
  `

[snorrebot]

Found it: under data you have to type once again the
entity_id: media_player.keuken