创建合同-收款计划

{
    "collectionPlanJ": {
        "childType": "string",
        "data": [
            {
                "planType": "string",
                "totalAmount": 0,
                "planStartDate": "string",
                "planEndDate": "string",
                "dimensionality": "string",
                "periodInterval": 0
            }
        ]
    }
}