[
  {
    "beat_no": "HB-001",
    "channel_id": "CH-01",
    "device_id": "DEV-0101",
    "received_at": "2026-09-10T14:21:57",
    "frame_seq": 88098,
    "bitrate_kbps": 1440
  },
  {
    "beat_no": "HB-002",
    "channel_id": "CH-01",
    "device_id": "DEV-0101",
    "received_at": "2026-09-10T14:22:02",
    "frame_seq": 88120,
    "bitrate_kbps": 1450
  },
  {
    "beat_no": "HB-003",
    "channel_id": "CH-03",
    "device_id": "DEV-0307",
    "received_at": "2026-09-10T14:21:05",
    "frame_seq": 41208,
    "bitrate_kbps": 980
  },
  {
    "beat_no": "HB-004",
    "channel_id": "CH-03",
    "device_id": "DEV-0307",
    "received_at": "2026-09-10T14:22:05",
    "frame_seq": 41208,
    "bitrate_kbps": 970
  },
  {
    "beat_no": "HB-005",
    "channel_id": "CH-07",
    "device_id": "DEV-0712",
    "received_at": "2026-09-10T14:19:41",
    "frame_seq": 20510,
    "bitrate_kbps": 720
  },
  {
    "beat_no": "HB-006",
    "channel_id": "CH-11",
    "device_id": "DEV-1104",
    "received_at": "2026-09-10T14:22:03",
    "frame_seq": 65001,
    "bitrate_kbps": 380
  },
  {
    "beat_no": "HB-007",
    "channel_id": "CH-02",
    "device_id": "DEV-0102",
    "received_at": "2026-09-10T14:22:04",
    "frame_seq": 77310,
    "bitrate_kbps": 1210
  },
  {
    "beat_no": "HB-008",
    "channel_id": "CH-08",
    "device_id": "DEV-0815",
    "received_at": "2026-09-10T14:22:00",
    "frame_seq": 30112,
    "bitrate_kbps": null
  },
  {
    "beat_no": "HB-009",
    "channel_id": "CH-12",
    "device_id": "DEV-1205",
    "received_at": "2026-09-10T14:22:06",
    "frame_seq": 51044,
    "bitrate_kbps": 400
  },
  {
    "beat_no": "HB-010",
    "channel_id": "CH-15",
    "device_id": "DEV-1510",
    "received_at": "2026-09-10T14:22:01",
    "frame_seq": 12008,
    "bitrate_kbps": 640
  },
  {
    "beat_no": "HB-011",
    "channel_id": "CH-21",
    "device_id": "DEV-2101",
    "received_at": "2026-09-10T14:21:58",
    "frame_seq": 44120,
    "bitrate_kbps": 0
  },
  {
    "beat_no": "HB-012",
    "channel_id": "CH-33",
    "device_id": "DEV-3301",
    "received_at": "2026-09-10T14:22:05",
    "frame_seq": 900,
    "bitrate_kbps": 1100
  }
]