Webhook validation works on 'orders/create' but not on 'subscription_contracts/create'

Shopify Apps
1

I’m using the following sentence to validate a Webhook:

const {valid}= await shopify.webhooks.validate({
rawBody: JSON.stringify(req.body),
rawRequest: req,
rawResponse: res,
});

It works as expected when a ORDERS/CREATE webhook is triggered, but in the case of ‘SUBSCRIPTION_CONTRACTS/CREATE’ it always return FALSE.
Any idea about what’s happening here?

Thanks in advance!