test on Nostr: Hello world

{ "id": "b2cee802a59e7eb36dd89f96296435ce1e4f8e81bc815bc3bb73346a5c67ba8a", "pubkey": "972f233aa467bc9804032c0bce0a117daead5473c56c91e811a216bdd08c08cf", "created_at": 1725998308, "kind": 1, "tags": [], "content": "Hello world", "sig": "dcb7f521fe642d96f0c25feadbbb01fca7c41ecb0891908846e5651c811bfb36261438f1dc0fa4c1ddd8b67ac78eca1c964b71c5cc1832dd9745e21415e7505a" }