WebhookEndpointSigning

legacy_signature
Type: boolean
required

When true, deliveries also carry X-Brellium-Signature (see the Webhooks overview).
previous_secret_expires_at
Type: string | null
required

After a rotation, deliveries are also signed with the previous secret until this time. null = no previous secret.
secret_hint
Type: string
required

A non-secret hint that identifies the current signing secret (its last characters).