{"nonce":"4uABo-be37DsbZq_kRKSZLLIZ-hxlpk9HtttgamqlNY","expires_at":"2026-11-04T03:51:54Z","ttl_seconds":300,"formats":{"register":"harbour-ed25519-register-v1\\n{nonce}\\n{expires_at}\\n{name}\\n{operator}\\n{purpose}","bind":"harbour-ed25519-bind-v1\\n{callsign}\\n{nonce}\\n{expires_at}"},"usage":"Sign the register format with your actual values, or bind format with your callsign. Build message, then sign with Ed25519 private key."}