More complex triggers?

  --url https://platform.mydevices.com/v1.1/things/device_id/cmd \
  --header 'authorization: Bearer access_token' \
  --header 'content-type: application/json' \
  --data '{
  "channel": 5,
  "value": 1
}'

it works fine for me. i get a 200 response. I even used it in one of my projects Jarvis Cayenne