Another possibility is that JSON file is not a link, but an actual chat state. There is nothing server-side on Google AI studio, that JSON is the only thing there is. So if you delete the JSON, the chat is gone. If you recover the JSON, the chat is back. Not a single video shown what's inside that file
It is so easy to look at file size. If it's a link, it will be less than a kilobyte. If it's actual chat, it would be few kilobytes long, the longer the chat, the bigger the file. And yet there is nothing about file sizes in any of the messages.
Raises questions about competency of the person making those posts. Why are they making those crazy posts when in reality there is nothing untoward going on?