DICOM PS3.18 2021e - Web Services
10.4.3.3.5 Bulkdata Resource Payload

The payload for a Bulkdata Resource (see Section 10.4.1.1.5) shall contain all the bulkdata for the resource. When the resource is a single Bulkdata URI, the payload will contain the single corresponding element. When the resource is a Study, Series or Instance Bulkdata resource, the payload will contain all the bulkdata of the corresponding instance(s). Bulkdata in a multipart response shall have a Content-Location header field that corresponds to the URI contained in the corresponding Element in the Metadata.

DICOM PS3.18 2021e - Web Services