{
  "event": "addDevice",
  "payload": {
    "id": "of:0000ffffffffff08",
    "type": "roadm",
    "online": true,
    "master": "onos-3",
    "labels": [
      "0000ffffffffff08",
      "FF:FF:FF:FF:FF:08",
      "opt-8"
    ],
    "metaUi": {
      "x": 734,
      "y": 577
    }
  }
}