curl 'https://api.pipedream.com/v1/workspaces/o_abc123/subscriptions' \
  -H 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "sub_abc123",
      "emitter_id": "dc_abc123",
      "listener_id": "p_abc123",
      "event_name": ""
    },
    {
      "id": "sub_def456",
      "emitter_id": "dc_def456",
      "listener_id": "p_def456",
      "event_name": ""
    }
  ]
}