[jQuery] Ajax JSON POST in HTTP Body

$.ajax({
    url: ".../api/test",
    type: "post",
    accept: "application/json",
    contentType: "application/json; charset=utf-8",
    data: JSON.stringify(param),
    dataType: "json",
    success: function(data) {
        // success handle
    },
    error: function(jqXHR, textStatus, errorThrown) {
        // fail handle
    }
});