57012: Signature invalidERROR: 57012error-57012 page anchorPROGRAMMABLE SMSERROR Descriptiondescription page anchorSignature invalid Possible Causespossible-causes page anchorRequest signature passed in X-Registry-Signature header is invalid Possible Solutionspossible-solutions page anchorConfirm signature consists of WebhookURL + canonicalized JSON payload and signed with HMAC-SHA1