This is where you should alter the context to fit the action.

        Default behaviour will leave the context as it is.

def _prepare(cls, context: Dict) -> Dict:
        """This is where you should alter the context to fit the action.

        Default behaviour will leave the context as it is.
        """
        if not context and cls.raise_empty_context:
            raise PolyaxonActionException('{} received invalid payload context.'.format(cls.name))

        return context