def METHOD_NAME(self):
    JSON = (
        """
    {
      "coin_spends": [],
      "aggregated_signature": "%s"
    }
    """
        % NULL_SIGNATURE
    )
    spend_bundle = SpendBundle.from_json_dict(json.loads(JSON))
    json_1 = json.loads(JSON)
    json_2 = spend_bundle.to_json_dict(include_legacy_keys=False, exclude_modern_keys=False)
    assert json_1 == json_2