x-api-key: ********************curl --location --request POST 'https://online-banking.originalaccounts.com/v3/webhooks/subscribe' \
--header 'x-api-key: <api-key>' \
--header 'Content-Type: application/json' \
--data-raw '{
"subscription_type": "entity",
"url": "https://webhook.site/your-url",
"header_key": "X-API-KEY",
"header_value": "secret"
}'"string"