npub1u5…78ude on Nostr: How it's done?

{ "id": "627ba5341721ccf76f1daa0eefc65d84afe40e8455c0a40251943af64173ac17", "pubkey": "e5272ce7d921cedc5ef3a6c841100545d0dd18628db61e835be542518887fb81", "created_at": 1726723650, "kind": 1, "tags": [], "content": "How it's done?", "sig": "dba5e2cf0624f1ef31467f90e59dcfb759ff9684fba2383fbf1d13271952299ecfae09f2456b68e48a0c36eaf116b44624f99781616e02558a724fc9e412cb24" }