HowTo Set CF/CFU/CFB via RestAPI?

I try to learn to use the Restapi
I already know howto use the GET Commands and also have Successfully switched the “DND” button with the API

But i dont know how i can exec a PUT Command to set a new CF

Can someone help me on this?
My URL i tried looks like this:

./ PUT http://URL:83/rest.php/rest/callforward/users/101/ token1 token2 [167] [CF]