def METHOD_NAME(num_subs: int, input_file: str):
    _load_subs(num_subs)
    list_subs_reqs = []
    for i in range(1, num_subs):
        list_sub_req_dict = json_format.MessageToDict(Void())
        list_subs_reqs.append(list_sub_req_dict)
    with open(input_file, 'w') as file:
        json.dump(list_subs_reqs, file, separators=(',', ':'))