{
  "type": "object",
  "required": [
    "chat_channel_id",
    "last_read_message_id",
    "muted",
    "desktop_notification_level",
    "mobile_notification_level",
    "following",
    "last_viewed_at"
  ],
  "properties": {
    "chat_channel_id": { "type": "number" },
    "last_read_message_id": { "type": ["number", "null"] },
    "muted": { "type": "boolean" },
    "desktop_notification_level": { "type": "string" },
    "mobile_notification_level": { "type": "string" },
    "following": { "type": "boolean" },
    "user": {
      "type": ["object", "null"],
      "required": ["id", "name", "avatar_template", "username"],
      "properties": {
        "id": { "type": "number" },
        "name": { "type": "string" },
        "avatar_template": { "type": "string" },
        "username": { "type": "string" },
        "can_chat": { "type": "boolean" },
        "has_chat_enabled": { "type": "boolean" }
      }
    },
    "last_viewed_at": { "type": "datetime" }
  }
}