How to pass a list from JS to MVC controller

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C#

Javascript

HTML

Ajax

MVC

Hello experts
I have a list from movie.js file, I want to send my list to HomeController in Passthings function. But when I use a breakpoint on the PassThings function, I notice that the list(i mean,I do not receive this list in my function that I send from the javascript file ) in PassThings function is empty.
This is the code of my movie.js file:

function fun1() {
    $(document).ready(function () {
        var things = [
            { id: 1, color: 'yellow' },
            { id: 2, color: 'blue' },
            { id: 3, color: 'red' }
        ];

        var thing = {
            ThingList : things
        }

        $.ajax({
            dataType: 'json',
            type: 'POST',
            url: '/Home/PassThings',
            data: thing,
            success: function () {
                $('#result').html('"PassThings()" successfully called.');
            },
            failure: function (response) {
                $('#result').html(response);
            }
        });
    });

}

SaveBtn.addEventListener('click', fun1);

and here is my Home/Passthings Action:

public void PassThings(List<Thing> things)
{
    var t = things;
}

and here is my model :

public class Thing
{
    public int Id { get; set; }
    public string Color { get; set; }
}

and in the my Index.cshtml i use this to call my movie.js file :

<pre>
<div class="col-6 col-md-3">
    <button type="submit" id="SaveBtn" class="btn btn-primary form-control">Save</button>
</div>
<script src="~/js/movie.js"></script>

What I have tried:

i tried with using [httpPost]
and i tried with IActionResult too :

[HttpPost]
    public IActionResult PassThings ([FromBody]IEnumerable<Thing> things)
    {
        return Ok();
    }