Get the request body.

def get_body(self, environ=None):
        """Get the request body."""
        body = dict(
            status=self.code,
            message=self.get_description(environ),
        )

        errors = self.get_errors()
        if self.errors:
            body['errors'] = errors

        if self.code and (self.code >= 500) and hasattr(g, 'sentry_event_id'):
            body['error_id'] = str(g.sentry_event_id)

        return json.dumps(body)