如何确保jQuery使用POST在header中提交正确的JSON键?

I have this snippet,

我有这段代码,

 pKey = $(this).attr("data-pk");
 var columnName = $(this).attr("name");
 var changedData = $(this).val();
 var data = {
        id : pKey,
        columnName : changedData
    };

    $.post('/HelloWorld/Edit/', data, function () {
        $("#status").html("<strong>" + pKey + ", " + myCurrentData + ": POST SUCCESS?:</strong>");
    })
 pKey = $(this