Describe the Nostr in six words. https://image.nostr.build/78e2593de82da3418b97b514f56e518eff6afaad3618f59b154837c12a9b41e9.png nostr:note1htdjk2ghh0c77zep0gelsmvr32vlce32453ed5f8n0dfv6aewa4s6jg376