post
https://{APP_DOMAIN}/api/3.2/subscriptions/bulk-actions
Executes a bulk action on subscriptions matching an advanced query. Runs as a background task. Supported actions: subscriber_add_tag, subscriber_remove_tag, subscription_add_tag, subscription_remove_tag, subscribe, cancel, add_to_funnel, remove_from_funnel, create_segment, add_to_segment.