curl --request GET \
  --url https://{FUSION HOST}/api/subscriptions/{id} \
  --header 'Authorization: Basic <encoded-value>'

{
  "resource": "<string>",
  "topic": "<string>",
  "numberOfListenerThreads": 123,
  "maxRetries": 123,
  "initialPosition": "<string>",
  "contextProperties": {},
  "id": "<string>"
}