webapi在保存时报错

保存的是销售出库单，找原因找啦好久没有找到

{
"Creator": "Demo",
"NeedUpDateFields": [
""
],
"Model": {
"FID": 0,
"FBillTypeID": {
"FNumber": "XSCKD01_SYS"
},
"FStockOrgId": {
"FNumber": "103"
},
"FSaleOrgId": {
"FNumber": "103"
},
"FSaleDeptID": {
"FNumber": "BM000005"
},
"FSalesGroupID": {
"FNumber": ""
},
"FSalesManID": {
"FNumber": "2014082201"
},
"FDeliveryDeptID": {
"FNumber": "BM000005"
},
"FDate": "2017-11-01 00:00:00",
"SubHeadEntity": {
"FEntryId": 0,
"FSettleCurrID": {
"FNumber": "PRE001"
}
},
"FCustomerID": {
"FNumber": "CUST0001"
},
"FHeadLocationId": "",
"FCarrierID": {
"FNumber": "VEN00002"
},
"FCarriageNO": "123456789555",
"FEntity": [
{
"FENTRYID": 0,
"FMaterialID": {
"FNumber": "A01-001"
},
"FUnitID": {
"FNumber": "Pcs"
},
"FMustQty": "2322322.0000000000",
"FRealQty": "2213.0000000000",
"FEntryCostAmount": "11112.0000000000",
"FStockID": {
"FNumber": "CK001"
},
"FStockStatusID": {
"FNumber": "KCZT01_SYS"
},
"FEntrynote": "33333333",
"FSrcType": "SAL_DELIVERYNOTICE",
"FSrcBillNo": "FHTZD000013",
"FEntity_Link": [
{
"FEntity_Link_FFlowId": "",
"FEntity_Link_FFlowLineId": "",
"FEntity_Link_FRuleId": "DeliveryNotice-OutStock",
"FEntity_Link_FSTableName": "T_SAL_DELIVERYNOTICEENTRY",
"FEntity_Link_FSBillId": "100014",
"FEntity_Link_FSId": "100025"
}
]
}
]
}
}
Result":{"ResponseStatus":{"ErrorCode":500,"IsSuccess":false,"Errors":[{"FieldName":"无法将类型为“System.String”的对象强制转换为类型“System.Collections.Generic.Dictionary`2[System.String,System.Object]”。","Message":" 在 Kingdee.BOS.WebApi.FormService.MapPropertyService.SetBaseDataField(BaseDataField field, DynamicObject targetObject, Object value, Int32 rowIndex)\r\n 在 Kingdee.BOS.WebApi.FormService.MapPropertyService.MapComplexProperty(String pkProperty, Dictionary`2 sourceObj, DynamicObject targetObj, Int32 rowIndex, HashSet`1 NeedUpDateFields)\r\n 在 Kingdee.BOS.WebApi.FormService.Save.Revole()\r\n 在 Kingdee.BOS.WebApi.FormService.Save.Execute()\r\n 在 Kingdee.BOS.WebApi.FormService.BillOperationService.ExecuteOperation(FormOperation op, String data)","DIndex":0}],"SuccessEntitys":[],"SuccessMessages":[]}}}