{
    "first_name":   { "length_between": [4, 6] },
    "last_name":    { "length_between": [6, 6] },
    "middle_name": [{ "length_between": [0, 100] }],
    "nick_name":    [{ "length_between": [0, 100] }],
    "number1":      { "length_between": [2, 4] },
    "empty_name":   { "length_between": [2, 3] },
    "missed_name":  { "length_between": [2, 3] }
}