I see

So in this case where nostr:nprofile1qyt8wumn8ghj7ct5d3shxtnwdaehgu3wd3skueqpz4mhxue69uhk2er9dchxummnw3ezumrpdejqqgqw2gfz684etnwchf0ktq2l05wfzfdgc9xc9xy74ef2kd57afk8usm9px6j is asking to edit an existing collection:

The UI would call the latest collection, allow the user to add gifs and then publish a new event with a new/random 'd' tag that can be retrieved by it's latest "created at" time

Makes sense, thanks!