Eslgaming api usage

How can one obtain json formated data of a cup structure (they call it bracket) from eslgaming? Did some research but found nothing about their api.

Sample url: https://play.eslgaming.com/clashroyale/global/clashroyale/open/1on1-yenkee-turnaj-12-czsk/bracket/?contestantId=11692456

Their web api exists tho as I am able to obtain information about the cup itself like this: https://play.eslgaming.com/api/leagues?types=cup&states=finished&path=/play/clashroyale/global/clashroyale/open/1on1-yenkee-turnaj-12-czsk/