data_json = {
    'dataframe_split': {
        'index': data_index,
        'columns': columns,
        'data': data
    },
    "client_request_id": "client_request_id",
    "params": {"a": 1}
}

url = f'{api_url}/serving-endpoints/{end_point}/invocations'
headers = {'Authorization': f'Bearer {api_token}', 'Content-Type': 'application/json'}
request = Request(method='POST', url=url, json=data_json, headers=headers)