NetSuite Restlet development can be hard; finding documentation is almost next to impossible. I’ve finally had a personal break through of:
What is the difference between nlapiCreateRecord and nlapiTransformRecord?
This article assumes that you have some NetSuite experience and have created a NetSuite Restlet. I have written a previous article that describes how to authenticate with NetSuite for calling a Restlet using token based authentication that should help you get up-to-speed.