aasaa on Nostr: It's described in NIP-19. Here's how Nuestr decodes it: ...

It's described in NIP-19.

Here's how Nuestr decodes it: https://github.com/alemmens/nuestr/blob/master/src/nuestr/nip19.clj

For example:
> (nuestr.nip19/decode "nevent1qqsx2qg9w9mxrffyuv32l7vewzvawlnfrerv5gqphkcd4rmqtz6qqxgpz9mhxue69uhkummnw3ezuamfdejj7q3qgcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqxpqqqqqqzqa58hn")
["nevent"
{:special "650105717661a524e322aff9997099d77e691e46ca2001bdb0da8f6058b40019",
:relays ("wss://nostr.wine/"),
:author "460c25e682fda7832b52d1f22d3d22b3176d972f60dcdc3212ed8c92ef85065c",
:kind 0N}]