I'd like to point out that this formatting convention is not a widespread standard. "You should" is biased towards making life simpler for a small number of people who have used the format before, while complicating and bloating your API responses - for both the developer(s) and consumers of your API.

Consumers are now expected to add a full library to their project to parse/understand the JSON responses. Also, implementation overload for many languages: http://jsonapi.org/implementations/