用WEBAPI保存供应商财务信息页签数据，无报错，但没有数据

请问一下，我想新增供应商财务信息页签数据，使用如下JSON字串无法新增进去，单据头字段有新增，财务信息单据体没有。是哪写错了吗
\"BD_Supplier__FBankInfo\": [
{
\"Id\": 0,
\"FOpenBankName\": \"福建省长乐市\",
\"FInPlace\": \"福建省长乐市\",
\"FBankName\": \"003\"
},
{
\"Id\": 0,
\"FOpenBankName\": \"A\",
\"FInPlace\": \"B\",
\"FBankName\": \"C\"
}
],

完整JSON字串
"BD_Supplier",
"{
\"Creator\": \"64366\",
\"NeedUpDateFields\": [
\"FCreateOrgId\",
\"FUseOrgId\",
\"FNumber\",
\"FName\",
\"FNameWithoutNumber\",
\"FShortName\",
\"FPayCurrencyId\",
\"BD_Supplier__FBankInfo\"
],
\"Model\": {
\"FSupplierId\": 0,
\"FCreateOrgId\": {
\"FOrgID\": 100001,
\"FNumber\": \"1.1\",
\"FName\": \"ABC\"
}, \"BD_Supplier__FBankInfo\": [
{
\"FOpenBankName\": \"福建省长乐市\",
\"FInPlace\": \"福建省长乐市\",
\"FBankName\": \"003\"
},
{
\"FOpenBankName\": \"A\",
\"FInPlace\": \"B\",
\"FBankName\": \"C\"
}
],
\"FNumber\": \"0.0521\",
\"FUseOrgId\": {
\"FOrgID\": 100001,
\"FNumber\": \"1.1\",
\"FName\": \"ABC\"
},
\"FName\": \"厦门市环岛工贸有限公司-0.0521\",
\"FNameWithoutNumber\": \"厦门市环岛工贸有限公司\",
\"FShortName\": \"环岛工贸\",
\"FGroup\": {
\"FID\": 0,
\"FNumber\": \"1.0\",
\"FName\": \"国内供应商\"
},
\"FCreatorId\": {
\"FUserID\": 828949,
\"FUserAccount\": \"64366\",
\"FName\": \"小明\"
},
\"FCreateDate\": \"2015-12-22\",
\"FModifierId\": {
\"FUserID\": 828949,
\"FUserAccount\": \"64366\",
\"FName\": \"小明\"
},
\"FModifyDate\": \"2015-12-22\",
\"FAuditorId\": {
\"FUserID\": 828949,
\"FUserAccount\": \"64366\",
\"FName\": \"小明\"
},
\"FAuditDate\": \"2015-12-22\",
\"FDocumentStatus\": \"A\",
\"FForbidStatus\": \"A\",
\"FIsTempSupplier\": false,
\"FIsRelaSupplier\": false,
\"BD_Supplier__FFinanceInfo\": {
\"FPayCurrencyId\": {
\"FCURRENCYID\": 1,
\"FNumber\": \"CNY\",
\"FName\": \"人民币\",
\"FSYSMBOL\": \"¥\",
\"FPRICEDIGITS\": 0,
\"FAMOUNTDIGITS\": 0,
\"FIsShowCSymbol\": false,
\"FFormatOrder\": \"1\"
}
}
}"