chrome sync storage to store and update array

is it possible to store array in chrome storage sync and retrieve them ?

var uarray = [abc,def,ghi];

Is it possible to update the stored array in the storage ?

var tobeadded = jkl;
uarray.push(tobeadded);

this was the syntax in documentation

chrome.storage.sync.set({'value': theValue}, function() {
    // Notify that we saved.
    message('Settings saved');
});

My bookmark extension, need to store the id of bookmark and retrieve them for internal search and stuffs based on it. bookmarking needs update of ID in storage sync periodically.

Thanks!!