null on Nostr: Hello world

{ "id": "044abf0f24a3e1354d8d5f1bfdd750e567e5381f81c57a2be969a7d90deba370", "pubkey": "f0f57d4a93f8722f8cbd1b332d9e8c0f1c52609770e6134dc892fbc2eef4ef6a", "created_at": 1671277920, "kind": 1, "tags": [], "content": "Hello world", "sig": "e83542ecbe0231dc140db64753eaefd2f4c763867107d5f48daebdb7901dc72353b1d724419341aa1e3806e79b6077b4a593be333afcaaafee42b9283c5151f3" }