{
  "type": "voice_event",
  "ts": 1717555201.234,
  "call_family": "GROUP",
  "phase": "START",
  "direction": "RX",
  "system": "MASTER-A",
  "stream_id": 2155905152,
  "peer_id": 1001,
  "src_id": 3120001,
  "slot": 2,
  "dst_id": 52090,
  "duration_s": null,
  "is_announcement": false
}