{
  "event": "addDevice",
  "payload": {
    "id": "of:000000000000000a",
    "type": "switch",
    "online": true,
    "master": "onos",
    "labels": [
      "",
      "sw-A",
      "000000000000000a"
    ],
    "metaUi": {
      "x": 300,
      "y": 300
    }
  }
}