{
  "type": "<string>",
  "sid": 123,
  "msg": {
    "order_id": "<string>",
    "user_id": "<string>",
    "client_order_id": "<string>",
    "ticker": "<string>",
    "side": "<string>",
    "price": "<string>",
    "fill_count": "<string>",
    "remaining_count": "<string>",
    "self_trade_prevention_type": "<string>",
    "order_group_id": "<string>",
    "expiration_ts_ms": 123,
    "last_updated_ts_ms": 123,
    "last_update_reason": "<string>",
    "subaccount_number": 123,
    "order_source": "<string>"
  },
  "sending_ts_ms": 123
}