User Meta Data
data class UserMetaData(val name: String? = null, val about: String? = null, val picture: String? = null, val nip05: String? = null, val banner: String? = null, @Json(name = "display_name" ) val displayName: String? = null, val website: String? = null, val tags: List<Tag> = emptyList()) : EventContent
User metadata (profile). Event kind 0, as defined in nip-01.