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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def smart_email_send(self, smart_email_id, to, consent_to_track, cc=None, bcc=None, attachments=None, data=None, add_recipients_to_list=None):
 """Sends the smart email."""

        validate_consent_to_track(consent_to_track)
        body = {
            "To": to,
            "CC": cc,
            "BCC": bcc,
            "Attachments": attachments,
            "Data": data,
            "AddRecipientsToList": add_recipients_to_list,
            "ConsentToTrack": consent_to_track,
        }
        response = self._post("/transactional/smartEmail/%s/send" %
                              smart_email_id, json.dumps(body))
        return json_to_py(response)