{
  "event": "addDevice",
  "payload": {
    "id": "sw4b",
    "type": "roadm",
    "online": true,
    "labels": [
      "",
      "sw-4b",
      "00004b"
    ],
    "metaUi": {
      "x": 800,
      "y": 600
    }
  }
}