Create a salesOrder and CashSale using the REST API

I need to create a SalesOrder, ItemFulfillment, and a CashSale record in Netsuite for accounting purposes, using the REST API to represent a credit card transaction that already took place in one of our applications. The payment details use a Custom Form installed by the payment processing vendor. From Postman, I'm sending the following JSON to this endpoint: https://99990-sb1.suitetalk.api.netsuite.com/services/rest/record/v1/salesOrder

I was hoping to get the new Id from the salesOrder from this post call, so I can create a ItemFulfillment and a corresponding CashSale record. I also need to figure out how to move the orderStatus from PendingFulfillment to Billed in this process. The paymentMethod, the creditCardNumber and the CVV are not getting set/saved - perhaps there is a permissions setting that preventing from being displayed in NS? Is it possible to create a salesOrder, itemFulfillment, and cashSale all in one request?