{
  "event": "addDevice",
  "payload": {
    "id": "of:000000000000000b",
    "type": "switch",
    "online": true,
    "master": "onos",
    "labels": [
      "",
      "sw-B",
      "000000000000000b"
    ],
    "metaUi": {
      "x": 500,
      "y": 310
    }
  }
}