TrainChangeEstimateRequest

{
    "shoppingId": "train_change_shop_01J2X9",
    "journeyId": "train_journey_G3_20260721",
    "returnJourneyId": "train_journey_G4_20260726",
    "seatClassId": "yidengzuo",
    "passengerIds": [
        10001
    ]
}