import json


def task_to_json_dict_of_list(df_task):
    """
    Returns a dict of list like:

    {
        "Lat": [44.054901123046875, 44.01508712768555, 44.0536003112793,
                44.288883209228516, 44.41444778442383, 44.054901123046875],
        "Lon": [5.984000205993652, 6.0107221603393555, 6.32859992980957, 
                6.536116600036621, 6.381117343902588, 5.984000205993652],
        "Name": ["SaintAuban", "Go", "CoupeS", 
                "3Eveches", "DORMILLOUSEFORT", "SaintAuban"]
    }

    """
    return(json.dumps(df_task.to_dict(orient='list')))