TrainChangeEstimateApiResponse

{
    "code": 0,
    "message": "Success",
    "data": {
        "currency": "CNY",
        "cutoffAt": "2026-07-19 09:00:00",
        "priceBasis": "passenger",
        "items": [
            {
                "passengerId": 10001,
                "oldPrice": 553,
                "newPrice": 620,
                "changeFee": 0,
                "serviceFee": 20,
                "amount": 87
            }
        ]
    }
}