REST - accessing collection with simple:rest

Hi at all!
I need to realize a rest client in meter.
I have installed package simple:rest.
But i do not understand how to modify the collections.

I write a method for read collection and simple:rest, expose them, but for send data?

Please can i have a exemple for insert / update / data in the collection width rest?

Very thanks!
And thanks for you time for read this post.