Custom route for record.save() in ember

In ember , I have a model called "Post" . If i perform
record.save()

on creating a post , by default it posts to my /post url in Rails(backend). This works in my case. But for future uses, how do i specify a custom route? Let's say I want to post this model to my backend to a route called

"/post/save" .

How do i make record.save() in ember to go to this route?