Currently, we can get values with non-primitive data types via HTTP REST, they are represented in JSON form, but we can't put such values into the cache. Put can be used only with a limited set of data types (see GridJettyRestHandler#convert).
The ability to put non-primitive data types should be added (binary object should be created from JSON).
We should also check that the get operation for such data types after put returns data in the same form. And inserted values correctly matched to query entities for the cache (we should be able to select inserted data via SQL).