ChangeSegmentItem

{
    "id": 301,
    "newSegment": {
        "departure": "PEK",
        "departureDate": "2026-08-08",
        "departureTime": "08:30",
        "arrival": "SHA",
        "arrivalDate": "2026-08-08",
        "arrivalTime": "10:45",
        "flightNo": "CA1234",
        "isCodeShare": "true",
        "opFlightNo": "CA1234",
        "cabinClass": "economy",
        "cabinCode": "Y"
    }
}