WriteOffBillUpdateParam(WriteOffBillUpdateParam)

{
    "attachments": [
        {
            "fileName": "string",
            "fileOriginalName": "string",
            "fileSize": 0,
            "fileType": "string",
            "fileUrl": "string"
        }
    ],
    "fundAccountId": 0,
    "id": 0,
    "operator": {
        "id": 0,
        "name": "string"
    },
    "remark": "string",
    "writeOffReceivableRecords": [
        {
            "receivableRecordId": 0,
            "writeOffMoney": 0
        }
    ],
    "writeOffTime": "2019-08-24T14:15:22.123Z"
}