MVC 4 post, recieve one object, is Posible

hello.
I have one service in MVC4 which recieve one object and resend another one. is posible to call it from a vb6 program?
I seek information and I found about soap services but not about restful service I only find how I can send a simple type but not objects.
any info will be good for me.

thanks for all , and sorry for my english.