{
  "event": "addDevice",
  "payload": {
    "id": "of:0000ffffffffff07",
    "type": "roadm",
    "online": true,
    "labels": [
      "",
      "opt-7",
      "0000ffffffffff07"
    ],
    "metaUi": {
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      "y": 446
    }
  }
}