A response object contains the parsed response (JSON object) from the Change.org API request. You can retrieve the entire object or a specific value. See the example below.
var response=new ChangeOrgApiResponse();
response.setData({
status : 1,
name : 'Joe Schmoe'
});
console.log(JSON.stringify(response.getData()));
// {"status":1,"name":"Joe Schmoe"}
console.log(response.getData('name'));
// Joe Schmoe