{
  "event": "addDevice",
  "payload": {
    "id": "of:0000ffffffff0007",
    "type": "switch",
    "online": true,
    "master": "myInstA",
    "labels": [
      "",
      "sw-7",
      "0000ffffffff0007"
    ],
    "metaUi": {
      "x": 530,
      "y": 330
    }
  }
}