How to read JSON object to WebAPI

Question

I\'ve checked a few similar questions, but none of the answers seem to fit (or dumb it down enough for me). So, I have a really simple WebAPI to check if user with an email

Answer 1

var dto = {        
    Email: "ex.ample@email.com"
};

$.ajax({
    url: "/api/User/",
    type: "GET",
    data: dto,
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function (data) {
        if (data == true) {
            // notify user that email exists
        }
        else {
            // not taken
        }             
    }                      
});