Currently the payload is very strict to the entity values. See https://api.github.com/users/danizord, Github shows the URL of my repositores collection, not an array of repositories. And it shows some info that probably is not in my Entity, e.g followers count.

Customize the payload is a common use-case. The resource representation is not always exactly the entity values.
It'd be great if zfr-rest cover such cases.

Ok, I'm going beyond the scope of this PR. But as said, I think the developer should customize the payload in another place, not in the hydrator :D