{
  "event": {
    "header": {
      "namespace": "Alexa.Discovery",
      "name": "Discover.Response",
      "payloadVersion": "3",
      "messageId": "Unique identifier, preferably a version 4 UUID"
    },
    "payload": {
      "endpoints": [
        {
          "endpointId": "Unique ID of the endpoint",
          "manufacturerName": "Manufacturer of the endpoint",
          "description": "Smart Speaker by Speaker Maker",
          "friendlyName": "Computer speaker",
          "displayCategories": [
            "SPEAKER"
          ],
          "cookie": {},
          "capabilities": [
            {
              "type": "AlexaInterface",
              "interface": "Alexa.Speaker",
              "version": "3",
              "properties": {
                "supported": [
                  {
                    "name": "volume"
                  },
                  {
                    "name": "muted"
                  }
                ],
                "retrievable": true,
                "proactivelyReported": true
              }
            },
            {
              "type": "AlexaInterface",
              "interface": "Alexa.PowerController",
              "version": "3",
              "properties": {
                "supported": [
                  {
                    "name": "powerState"
                  }
                ],
                "retrievable": true,
                "proactivelyReported": true
              }
            },
            {
              "type": "AlexaInterface",
              "interface": "Alexa",
              "version": "3"
            }
          ]
        }
      ]
    }
  }
}