delete https://www.virustotal.com/api/v3/collections//
As explained in /collections, for the urls relationship you either use {"type": "url", "url": <a URL string>} or {"type": "url", "id": <a sha256 URL identifier>} as object descriptors.
As explained in /collections, for the urls relationship you either use {"type": "url", "url": <a URL string>} or {"type": "url", "id": <a sha256 URL identifier>} as object descriptors.
Try It! to start a request and see the response here!