WLED Integration - Random effect

I`m trying to turn on WLED light with random effect selected everytime it turns on.

this script is not working for me. any idea why?

    action:
      - service: light.turn_on
        entity_id: light.wled_2 
        data:
          effect: random

i haven’t been able to figure this out either. If I make any progress ill let you know