:param asset_manager_id:
        :param business_date:
        :param curves:
        :param update_existing_rates:
        :return:

def persist_curves(self, asset_manager_id, business_date, curves, update_existing_curves=True):
        """
        :param asset_manager_id:
        :param business_date:
        :param curves:
        :param update_existing_rates:
        :return:
        """
        self.logger.info('Persist curves - Asset Manager: %s - Business Date: %s', asset_manager_id, business_date)
        url = '%s/curves/%s/%s' % (self.endpoint, asset_manager_id, business_date.isoformat())
        params = {'update_existing_curves': update_existing_curves}
        curves_json = [curve.to_interface() for curve in curves]
        response = self.session.post(url, params = params, json=curves_json)
        if response.ok:
            curves = [json_to_curve(curve) for curve in response.json()]
            return curves
        else:
            self.logger.error(response.text)
            response.raise_for_status()