WEBAPI物料不识别，提示必填

下面是我具体的 “FMaterialId\":{\"FNumber\":\"000002\" 我填写了啊 但为什么报错提示物料必填呢 还有其他东西也需要填写才能认吗
"\"FEntity\":[{\"FEntryID\":\"1\",\"FMaterialId\":{\"FNumber\":\"000002\"},\"FBarCode\":\"\",\"FAuxPropId\":{},\"FUnitID\":{\"FNumber\":\"Pcs\"},"+
"\"FQty\":\"88\",\"F_CMK_SFS\":\"0\",\"FAuxUnitID\":{\"FNumber\":\"\"},\"FAuxQty\":\"0\",\"FPrice\":\"0\",\"FAmount\":\"0\",\"FLot\":{\"FNumber\":\"\"},"+
"\"FProduceDate\":\"1900-01-01\",\"FEXPIRYDATE\":\"1900-01-01\",\"FSrcStockID\":{\"FNumber\":\"106000\"},\"FSrcStockLocId\":{},"+
"\"FDestStockId\":{\"FNumber\":\"106000\"},\"FDestStockLocId\":{},\"FSrcStockStatusID\":{\"FNumber\":\"KCZT01_SYS\"},"+
"\"FDestStockStatusID\":{\"FNumber\":\"KCZT05_SYS\"}," +
"\"FBOMID\":{\"FNumber\":\"\"},\"FMtoNo\":\"\",\"FNote\":\"\",\"FBFLowId\":{\"FId\":\"\",\"FName\":\"\"},\"FOwnerTypeID\":\"BD_OwnerOrg\","+
"\"FOwnerID\":{\"FNumber\":\"106\"},\"FKeeperTypeID\":\"BD_KeeperOrg\",\"FKeeperID\":{\"FNumber\":\"106\"},\"FOwnerTypeInID\":\"BD_OwnerOrg\","+
"\"FOwnerInID\":{\"FNumber\":\"106\"},\"FKeeperTypeInID\":\"BD_KeeperOrg\",\"FKeeperInID\":{\"FNumber\":\"106\"},\"FProjectNo\":\"\","+
"\"FBaseUnitID\":{\"FNumber\":\"\"},\"FBaseQty\":\"0\",\"FSNUnitID\":{\"FNumber\":\"\"},\"FSNQty\":\"0\",\"FAcctQty\":\"0\",\"FBaseAcctQty\":\"0\","+
"\"FHasQty\":\"0\",\"FBaseHasQty\":\"0\",\"FUUIDE\":\"\",\"FSourceBillNo\":\"\",\"FDestMaterialId\":{\"FNumber\":\"\"}," +
"\"FSerialSubEntity\":[{\"FDetailID\":\"0\",\"FSerialNo\":\"\",\"FSerialNote\":\"\",\"FUUIDS\":\"\"" +