How to setup tasmota magichome color and white channel in scene

Configuration
1

hi all
actually i try to create scenes for the light but i’m struggling in setting up the magichome device. i can create the color in automation with mqtt.publish. with the following code i can control all color at the same time.

- id: '1572620519359'
  alias: Licht Wohnzimmer LED Stripe EIN
  description: ''
  trigger:
  - entity_id: switch.licht_wohnzimmer_2
    platform: state
    to: 'on'
  condition: []
  action:
  - alias: ''
    data:
      payload: 255,50,0,255
      topic: Sonoff-1111/cmnd/Color2
    service: mqtt.publish

how can i implement this mqtt.publish command in a scene?