If you do, please think about integration first, so it's actually usable. This might be a good plugin for Pretix, for example. https://docs.pretix.eu/en/latest/development/api/plugins.html
proof of concept for nostr:npub1m2mvvpjugwdehtaskrcl7ksvdqnnhnjur9v6g9v266nss504q7mqvlr8p9 – chaumian ecash conference tickets? nostr:npub1parp0lkn26z4aznndhr0l09zfdfm8mkmmlmre8jgt92ajrywsd0q3samkj
required only minimal changes in the mint and the wallet. the mint sells tickets for a fixed BTC price via Lightning. users can trade tickets aftermarket without double-spend risk – buying a ticket that has been sold multiple times, a very common issue for conferences, concerts, etc. should we explore this further?

Discussion
Does it allow you to creat your own ticket?
The short answer is yes. https://github.com/pretix/pretix
The long answer is it's probably a bit more complicated than that.
pretix is sweet, works good and self hostable
Pretix would be great. It's used by CCC, HCPP, Paralelní Polis.
Although for me it could be super simple. Actually I don't even need the sales system, only pre generated tokens and I can distribute the tickets myself. I organize very simple events. And I'd like to not even have email address or any other user info. So what nostr:nprofile1qqs9pk20ctv9srrg9vr354p03v0rrgsqkpggh2u45va77zz4mu5p6ccpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhsz9thwden5te0dehhxarj9ehhsarj9ejx2a30qyg8wumn8ghj7mn0wd68ytnddakj7xph5zr created is even better than pretix, where there's a more complicated sales process with t-shirt sizes, email addresses, name tags.
I just need "one entry, not used yet, valid".
Can't wait to try it out.