创建合同-合同行

{
    "contractLine": {
        "childType": "string",
        "data": [
            {
                "price": 0,
                "quantity": 0,
                "materialsCode": "string",
                "partyUuid": "string",
                "partyNumber": "string",
                "partyNumberType": "string"
            }
        ]
    }
}