data.attributes.list_id in the request body; the list's list_type determines whether company or contact references are accepted. Up to 100 items may be supplied per request. To add members, use POST /v1/lists/batch-add-to-list-jobs — adding and removing are separate jobs.202 Accepted with a job handle. Poll GET /v1/lists/batch-remove-from-list-jobs/{job_id} to observe progress and the per-item outcome.lists:write OAuth2 scope.