Yandex map api automatic json generation?

Question

API

Tell me if there are any automatic json generators for Yandex map api?
The task is to put a lot of marks on the map using api, using json, according to the Yandex documentation
https://tech.yandex.ru/maps/jsbox/2.1/object_manager
Manually compiling json is a waste of time.
I honestly searched in the search, nothing sensible, except for articles about json itself. ((

Answer 1

json is a plain text file.
where will you get the information to fill the file?
or maybe the issue was already resolved in 2-3 months) then how did you do it?

Answer 2

How did you do that?