Set the subscriptions to a specific list of values

async def _set_subscriptions(self, subscriptions):
        """
        Set the subscriptions to a specific list of values
        """

        url, params = self._get_subscriptions_endpoint()

        data = {
            'object': 'page',
            'callback_url': self.webhook_url,
            'fields': ', '.join(subscriptions),
            'verify_token': self.verify_token,
        }

        headers = {
            'Content-Type': 'application/json',
        }

        post = self.session.post(
            url,
            params=params,
            data=ujson.dumps(data),
            headers=headers,
        )

        async with post as r:
            await self._handle_fb_response(r)
            data = await r.json()