def send_change_event(self, **properties):
        """
        Send a change event to the v2 Change Events API.

        See: https://developer.pagerduty.com/docs/events-api-v2/send-change-events/

        :param **properties:
            Properties to set, i.e. ``payload`` and ``links``
        :returns:
            The response ID
        """
        event = deepcopy(properties)
        response = self.post('/v2/change/enqueue', json=event)
        response_body = try_decoding(successful_response(
            response,
            context="submitting change event",
        ))
        return response_body.get("id", None)

    def send_change_event(self, payload={}, links=[], routing_key=None):
        """
        Send a change event to the v2 Change Events API.

        See: https://developer.pagerduty.com/docs/events-api-v2/send-change-events/

        :param payload:
            A dictionary object with keys ``summary``, ``source``, ``timestamp`` and
            ``custom_details`` as described in the above documentation.
        :param links:
            A list of dictionary objects each with keys ``href`` and ``text``
            representing the target and display text of each link
        :param routing_key:
            (Deprecated) the routing key. The parameter is set automatically to the
            :attr:`ApiClient.api_key` property in the final payload and this argument is ignored.
        :returns:
            The response ID
        """
        if routing_key is not None:
            deprecated_kwarg(
                'routing_key',
                method='EventsApiV2Client.send_change_event'
            )
        event = {'payload': deepcopy(payload)}
        if links:
            event['links'] = deepcopy(links)
        response = self.post('/v2/change/enqueue', json=event)
        response_body = try_decoding(successful_response(
            response,
            context="submitting change event",
        ))