The notification kind, returned by calling
kind on the notification object, reveals what triggered the webhook. For a Grant API webhook,
$webhookNotification->kind will be one of the following:
The following table describes the conditions that trigger each kind of webhook.
A payment instrument that was previously granted to another Braintree merchant has been updated.
An object containing the payment method nonce, which represents the updated payment instrument. The attributes are:
See the Grant API webhooks guide for additional attributes specific to each webhook kind.
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