I've also done this today - a shiny new avatar for nostr:npub1p5zp0fzzngsrkp2dgc2nf7akrl4ax9yt3hfa38scsl0m2d03v8ss6l2glp <3
https://cdn.masto.host/mastodonart/media_attachments/files/112/615/577/619/946/827/original/abac36be9df771ab.png