You must have read or all privileges and the delete sub-feature privilege for the Cases feature in the Management, Observability, or Security section of the Kibana feature privileges, depending on the owner of the cases you're deleting.
The cases that you want to removed. To get the case identifiers, use the search cases (_find) API. In the Dev Console, you can specify the array of cases in the following format: ids=["e58e77e3-ef8e-4251-926f-efb115f3c4ec"]. In curl, all non-ASCII characters must be URL encoded. For example: ids=%5B%22e58e77e3-ef8e-4251-926f-efb115f3c4ec%22%5D