curl --request POST \
  --url https://sandbox.finhub.cloud/api/v2.1/webhooks/subscriptions \
  --header 'Content-Type: application/json' \
  --data '
{
  "customerId": "<string>",
  "subscriptionName": "<string>",
  "description": "<string>",
  "endpointUrl": "<string>",
  "secretKey": "<string>",
  "signatureAlgorithm": "<string>",
  "verifySsl": true,
  "subscribedEvents": [
    "<string>"
  ],
  "maxRetryAttempts": 123,
  "retryBackoffSeconds": 123
}
'