Javascript 中性粒子存储

这是用于编写JSON的NeutralinoJS存储API。是否可以使用新的JS对象更新JSON文件（推送数据），而不仅仅是overvrite数据。怎么做

    // Javascript Object to be stored as JSON
let data = { 
    bucket : 'test', 
    content : { 
            item : 10 
    } 
}
// stores the data into JSON based data store.           
Neutralino.storage.putData(data,

// executes on successful storage of data
    function () {
    console.log('Data saved to storage/test.json');

    },
// executes if an error occurs

    function () {
    console.log('An error occured while saving the Data');

    }
);