notification/get - Returns a single existing notification.id - The ID of the notification to get.{id: <number> - The ID of the notification.channel_name: <number> - The name of the channel in which the notification is posted.text: <string> - The notification text.insert_time: <number> - The Unix timestamp of when the notification was posted.}NOTIFICATION_NOT_FOUND - A notification with the ID doesn't exist.