curl --request PUT \
  --url https://{FUSION HOST}/api/subscriptions \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '{
  "numberOfListenerThreads": 123,
  "maxRetries": 123,
  "initialPosition": "<string>",
  "contextProperties": {}
}'

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