找不到JSON密钥

My problem is that I have to POST a JSON object in the following format:

{ "key1": "value1",
  "key2": 2,
  "options": {
               "content": "lorem ipsum"
             }
}

But I keep getting an Internal server error: Key 'options' not found. This is my js code:

$("#button").click(function(){
var json_test = { 
      "key1": "value1",
      "key2": 2,
      "options": {
                   "content": "lorem ipsum"
                 }
    }
    $.ajax
    ({
        type: "POST",
        url: '/test/url/',
        dataType: 'json',
        data:json_test
    })
});

And also this is the POST contents from Firebug:

element_type    Text
learning_page   1
options[content]    lorem ipsum

I'm obviously doing something wrong but I just can't figure out what it is. Any ideas?

I'm not sure but you may be missing stringifying the json

$("#button").click(function(){
var json_test = { 
      "key1": "value1",
      "key2": 2,
      "options": {
                   "content": "lorem ipsum"
                 }
    }
    $.ajax
    ({
        type: "POST",
        url: '/courses/api/elements/',
        dataType: 'json',
        data:JSON.stringify(json_test)
    })
});

Also try adding

contentType: "application/json; charset=utf-8"

to your jquery options