get https://{content_domain}//campaigns/
Retrieve a list of slots used on a page, which then can be used to perform custom server-side personalization.
Example: <https://c8.dycdn.net/abcdefg1/campaigns/?k=z321xx4d&d=ptfbxnnebe&url=https%3A%2F%2Fwww.mysite.com%2F&vat=inc&landing-page-category=undefined&is_logged_in=false&curr=GBP>