{
  "event": "addDevice",
  "payload": {
    "id": "of:0000ffffffffff01",
    "type": "roadm",
    "online": true,
    "labels": [
      "",
      "opt-1",
      "0000ffffffffff01"
    ],
    "metaUi": {
      "x": 227,
      "y": 460
    }
  }
}