@staticmethod
def _get_payload_template(params=None):
    """Construct payload template.

        Args:
            params: Additional params.

        Returns:
            dict: Return payload dict.
        """
    if not params:
        params = {}
    payload_template = {'method': '', 'params': params, 'jsonrpc': '2.0',
        'id': 0}
    return payload_template
