Mini media player - browser and spotify

Im new to HA, need some help with the code below. Not sure how to combine two entity
I want Spotify shortcut to start the spotify playlist on the same device as HA running on.
I want Rix FM shortcut to start the url through browser mod entity

As of now the buttons are not working.

bild

          - type: custom:mini-media-player
            card_mod:
              style:
                .: |
                  ha-card {
                    height: 250px;
                  }
            name: " "
            group: false
            volume_stateless: false
            toggle_power: true
            cards:
            entity: media_player.spotify
            tab_action:
              action: more-info
            hide:
              power: true
              volume_level: false
              source: false
            shuffle: true
            artwork: cover
            volume_step: 1-20
            max_volume: 20
            min_volume: 1
            column_height: 100
            template: media
            replace_mute: stop
            source: full
            sound_mode: icon
            background: /local/background.png
            info: scroll
            scale: '1.6'
            icon: Spotify
            shortcuts:
              columns: 2
              buttons:
                - name: Spotify
                  type: playlist
                  id: xxxxxx
                - name: RIX FM
                  type: music
                  data:
                      entity_id: media_player.firefox
                      uri: https://fm01-ice.stream.khz.se/fm01_mp3