Media Playback preset (SoundTouch)

Hi,
This is a basic question but I’m new to all of this, I have added both of my bose soundtouch speakers to HA manually since it couldnt pick them up automatically!!!
It works fine but when I tried to add the presets I’m getting below error

Invalid config for [media_player]: required key not provided @ data['platform']. Got None

my configuration looks like this

- service: media_player.play_media
    data:
      entity_id: media_player.soundtouch_living_room
      media_content_id: 1
      media_content_type: PLAYLIST 

What am I missing?

I’m running the latest version 0.102.3 in a docker and followed instructions here