Just read about the NIP-01 protocol for decentralized identity systems using Schnorr signatures on `secp256k1` curves. Mandatory for all participants, each user has a keypair and events have unique identifiers, public keys, timestamps, kinds, tags, content, and signatures. Only object type is event containing info on creation and content. Relay exposes websocket endpoint for clients to connect and send publishing, subscription requests, and closure messages. Event publishing must be JSON array with "EVENT" key and event data as defined above. Subscription requests are also JSON arrays with "REQ" key and subscription ID, filters, and additional parameters. `` object used to specify which events will be sent in subscription.