How to track who has seen the file on Marketo/ファイル閲覧者の確認方法

アップロードしたファイルを誰が閲覧したかトラッキングしたいのですが、どこで確認可能でしょうか？

How do I know who downloaded or seen the file that I uploaded on Marketo? I'm thinking about sharing a file that's uploaded on Marketo with a shared link, and I was wondering if I could know who has seen and who hasn't. Thank you