noto on Nostr: What is this?

{ "id": "7380e84c9beb9004f1887fe8feaa6880d9701f144b1a36aa40a24b8ba8adc471", "pubkey": "d6ce5a26ed9df3ef11ac50c69854bf97378055e0afb7d5ed429550d5c572a6a7", "created_at": 1688295155, "kind": 1, "tags": [], "content": "What is this?", "sig": "7aa530cf7fbcdf14da7f5732fcafb6c8e2d74ba41cc1f918fef7660ecb21b7da8c960e788ed12d49b7787aa9dd6187818cc15e43474cb02b662efc18c017c81f" }