test on Nostr: Hello world

{ "id": "a306a0520f02b8c00d0df085f831d695487b9f85950e8cec8781387230f817c2", "pubkey": "972f233aa467bc9804032c0bce0a117daead5473c56c91e811a216bdd08c08cf", "created_at": 1725892081, "kind": 1, "tags": [], "content": "Hello world", "sig": "39b85694d3d07f2d787bf66f3e398d493b7aad64a68d5f7262e2c7e75efcaaf7b7af1c194ea82d807c99c9ed955c8648386585283079d6278c2d1df4c1e3d3d5" }