{
  "event": "participant_joined",
  "id": "{event_id}",
  "createdAt": "1720000001",
  "room": {
    "sid": "RM_test_joined",
    "name": "{room_name}"
  },
  "participant": {
    "sid": "PA_test",
    "identity": "{identity}",
    "name": "Test Participant"
  }
}
