def signature_sent(self):
        self.update_signature(
            status='sent',
            status_datetime=self.docusign_parser.envelope_status_datetime(
                'Sent'))
Handle 'sent' status reported by DocuSign callback.
dataset/ETHPy150Open novafloss/django-docusign/django_docusign/views.py/SignatureCallbackView.signature_sent