{
  "event": "addDevice",
  "payload": {
    "id": "of:0000000000000102",
    "type": "switch",
    "online": false,
    "master": "",
    "labels": [
      "",
      "sw-B-0",
      "of:0000000000000102"
    ],
    "metaUi": {
      "x": 120,
      "y": 450
    }
  }
}