Example request

{
  "comment": "Set environment variables on all devices in a fleet",
  "default_requests": {
    "vars_to_set": {
      "firmware_channel": "production",
      "log_level": "1"
    }
  },
  "select": {
    "devices_in_fleets": [
      "fleet:00000000-0000-0000-0000-000000000000"
    ]
  }
}