Very common in poorly designed RESTful architectures. Hypermedia-style APIs take care of this. [0] The performance advantage of lightweight payloads to an SPA gets trashed by network latency otherwise.
I don't think the structure of the response would be the dictating factor for a "poorly designed RESTful architecture". This response format no longer makes things RESTful because it lumps together so many different models. This format is more suited for command/presenter pattern (orchestration).
[0]: http://jsonapi.org/