'Deserialize the provided JSON data into a standard Python object'

@staticmethod
def parse(json_string):

    try:
        certificate = json.loads(json_string)
    except ValueError:
        raise CertificateValidationError(_('invalid    JSON'))
    certificate['version'] = CERTIFICATE_SCHEMA_VERSION
    if (certificate.get('signatories') is None):
        certificate['signatories'] = []
    certificate['editing'] = False
    return certificate
