jQuery ajax不发送js数组

My Array in console log

[Id: Array[24], sort: Array[24]]
Id: Array[24]
1: "2"
2: "6"
3: "8"
4: "9"
5: "10"
6: "12"
7: "13"
8: "14"
9: "15"
10: "16"
11: "17"
12: "18"
13: "19"
14: "20"
15: "22"
16: "23"
17: "24"
18: "25"
19: "26"
20: "27"
21: "28"
22: "29"
23: "30"
length: 24
__proto__: Array[0]
length: 0
sort: Array[24]
__proto__: Array[0]

But ajax send dont send it

console.log(sortedData);
$.ajax({
    'url':$('#base_url').val() + '/admin/admin/saveSorting',
    'type':'post',
    'data': {'sortedData':sortedData},
    success:function() {
    //
    }
});

I try to add content type application json and Json stringfy, but it doesnt help. How can i solve this problem Thanks for help.