This is a small demo of how JSONPatch works, in this code I demo how you could store JSON patch objects as "changes" in a JSON document you can store in a document store like MongoDB. Once you have your original document and changes you can easily "materialise" the full document from the patches which will let you have a way to do changelogs / audit logging of changes to your documents.
To run:
go run main.go Change patch.json as you see fit, following the JSONPatch operations to see the effect on the final document.