Is there really no way to do this via REST ?
GET https://vra8.corp.local/event-broker/api/subscriptions?%24filter=type%20ne%20%27SUBSCRIBABLE%27
GET https://vra8.corp.local/event-broker/api/subscriptions/sub_1647958459125
POST https://vra8.corp.local/event-broker/api/subscriptions {previous output}