How to generate macros within a palette from a JSON file?

I'm interested on build palettes from JSON files with macros that only pastes text (Insert text by pasting).

One example would be using Gitmoji JSON file to quickly access it later by search this generated palette.

I know I could create it manually but it could be easier if something dynamic is possible. Also would be interesting if JSON files can be modified on disk and palette get updated somehow.