header {
  gtfs_realtime_version: "2.0"
  incrementality: FULL_DATASET
  timestamp: 1611384628
}
entity {
  id: "400"
  vehicle {
    position {
      latitude: 0.0
      longitude: 0.0
      bearing: 0.0
      speed: 0.0
    }
    timestamp: 1611385437
    congestion_level: UNKNOWN_CONGESTION_LEVEL
    vehicle {
      id: "400"
      label: "400"
    }
    9: 0
  }
}