保存凭证时返回的Number如何在json中设置

保存凭证时json串如下：
{"Creator":"李","NeedUpDateFields":[],"Model":{"FVOUCHERID":0,"FAccountBookID":{"FNumber":"004"},"FDate":"2016-11-01","FSystemID":{"FNumber":"gl"},"FVOUCHERGROUPID":{"FNumber":"PRE001"},"FVOUCHERGROUPNO":"999999","GL_VOUCHER__FEntity":[{"FEXPLANATION":"库存盘点（库存申请调整)","FACCOUNTID":{"FNumber":"6602.37"},"FDEBIT":"0.670000"},{"FEXPLANATION":"测试","FACCOUNTID":{"FNumber":"1901.01"},"FCREDIT":"0.670000"}]}}

返回的json串如下：
{"Result":{"ResponseStatus":{"IsSuccess":true,"Errors":[],"SuccessEntitys":[{"Id":335111,"Number":"598","DIndex":0}],"SuccessMessages":[]},"Id":335111,"Number":"598"}}

返回的"SuccessEntitys":[{"Id":335111,"Number":"598","DIndex":0}]中的Number：598中这个598可以在保存凭证json串中设置吗，像保存科目、维度一样设置Fnumber那种形式？