{
  "id": "msg_dev_a7c1_1716391200_001",
  "channel": "sensors/floor-3/dev-a7c1/temperature",
  "event": "telemetry.reading",
  "data": {
    "deviceId": "dev-a7c1",
    "metric": "temperature",
    "value": 21.4,
    "unit": "C",
    "battery": 0.83,
    "readAt": "2026-05-22T14:00:00Z"
  },
  "encoding": "json",
  "contentType": "application/json",
  "publishedAt": "2026-05-22T14:00:01.120Z",
  "clientId": "dev-a7c1",
  "qualityOfService": "at-least-once",
  "sequence": 19874,
  "headers": {
    "schema": "telemetry-reading/v1",
    "site": "warehouse-east"
  }
}