<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get(self):
 """ Get a JSON-ready representation of this Personalization. :returns: This Personalization, ready for use in a request body. :rtype: dict """

        personalization = {}

        for key in ['tos', 'ccs', 'bccs']:
            value = getattr(self, key)
            if value:
                personalization[key[:-1]] = value

        for key in ['subject', 'send_at', 'dynamic_template_data']:
            value = getattr(self, key)
            if value:
                personalization[key] = value

        for prop_name in ['headers', 'substitutions', 'custom_args']:
            prop = getattr(self, prop_name)
            if prop:
                obj = {}
                for key in prop:
                    obj.update(key)
                    personalization[prop_name] = obj

        return personalization