Valid fields:
"id", "CreateDate", "AccountID", "Active", "DailyCost", "HourlyCost", "InstallDate", "MonthlyCost", "Notes", "NumberOfUsers", "PerUseCost", "ProductID", "ReferenceNumber", "ReferenceTitle", "SerialNumber", "SetupFee", "WarrantyExpirationDate", "ContractID", "ServiceID", "Type", "Location", "InstalledByID"