That makes using the data very easy, you could extract the fields using spath or the appropriate props.conf settings (I think indexed_extractions = JSON), and run very easy statistics over the values, e.g. splitting by app name. Adding further properties to an application object is very simple to do here.
As your data is now, using the JSON field name makes the following search pipeline extremely clumsy, if at all feasible. It'd likely be better to regex those fields from there than relying on the JSON field names. Basically, this is no real object structure (the O in JSON).