I want to make a discord bot command where the users would be able to load a new JSON from a dropbox/github link by simply using /load (link) or even simply checking the latest message in the designated discord channel by using /load for a URL containing the new JSON.

I know how to load a JSON once into the bot, but I just can't figure out how to make a command to scan for a new JSON that's posted in a message on the server. Any help is much appreciated!