JWT Authentication using Devise

I've been looking for a really god material about how to create Authentication using JWT and Devise, after that consume that with ReactJS (Mainly the rails part, but the react is a plus)

Some materials that I found are these:

https://www.sitepoint.com/introduction-to-using-jwt-in-rails/

https://medium.com/@goncalvesjoao/rails-devise-jwt-and-the-forgotten-warden-67cfcf8a0b73#.28po056fk

But I think are not complete. In my app I will need to manage several users type, permissions, roles and I read about JWT like a great option for securiy reasons instead of normal token authentication.

Other point is that I don't want to modify (unless if is really necesary) the Devise source code.

Any suggestion, material is welcome.

Thanks