Return details of a webhook subscription.
{- "WebhookMarketplaceSubscription": {
- "id": "webhook_aPGfVDO5pR3tPoUg",
- "marketplaceId": "mktp_aPGfTTO5pR3tPoUE",
- "events": [
- "MerchantCreated"
], - "description": "string",
- "metadata": { },
- "status": "Active",
- "secret": "string"
}
}