Item IDs and JSON

[PrimalOutshoot]

I'm trying to create a custom character sheet, but the WYSIWYG editor has been laggy in Obsidian (it can take a few minutes before it even opens to edit, and then moving things around is harder to manage). I had gone to write the JSON code for import, and wasn't sure if it needed to be minimized, or if that is just how fantasy statblocks exports it (not a prerequisite). I was also confused about the IDs, as I realized that they seem to be generated for every item added.

1. Does JSON code need to be in a minimized format?
2. How are the IDs generated - when writing custom JSON to import, what would be the ID solution?