{
  "event": "addDevice",
  "payload": {
    "id": "of:0000ffffffffff02",
    "type": "roadm",
    "online": false,
    "master": "192.168.56.101",
    "labels": [
      "",
      "opt-2",
      "0000ffffffffff02"
    ],
    "metaUi": {
      "x": 142,
      "y": 603
    }
  }
}