Does this do what you want:

#+BEGIN_SRC emacs-lisp :wrap json
(json-encode '((type . "text")))
#+END_SRC

#+RESULTS:
#+BEGIN_json
{"type":"text"}
#+END_json

John

-----------------------------------
Professor John Kitchin
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803
@johnkitchin
http://kitchingroup.cheme.cmu.edu


On Wed, Mar 28, 2018 at 1:42 PM, Ag Ibragimov <agzam.ibragimov@gmail.com>
wrote:

>
> Sorry, I don't know the best medium to convey ideas and I'm afraid not
> qualified (familiar with org-mode codebase) to submit a PR for this.
> I wonder how difficult would be to
> add the possibility to have babel src block results to be rendered as
> json?
> Basically a new result type https://orgmode.org/manual/
> results.html#results
>
> Thank you.
>
>