[
  {
    "name": "event_type",
    "type": "string",
    "mode": "nullable"
  },
  {
    "name": "room_id",
    "type": "string",
    "mode": "nullable"
  },
  {
    "name": "timestamp",
    "type": "timestamp",
    "mode": "nullable"
  },
  {
    "name": "client_timestamp",
    "type": "timestamp",
    "mode": "nullable"
  },
  {
    "name": "host",
    "type": "string",
    "mode": "nullable"
  },
  {
    "name": "flow_id",
    "type": "integer",
    "mode": "nullable"
  },
  {
    "name": "client_type",
    "type": "string",
    "mode": "nullable"
  }
]