Updating a kuzzle doc

I have a kuzzle document with a json like this:

j00:
{ '1': 'dsds',
  '2': 'rer',
  '5': 'yytyh hgvhg',
  '8': 'koo kllkl vv'
}

currently i'am doing this to update a key :

kuzzle_doc = await get_kuzzle_doc(i,c,d);

current_value = kuzzle_doc._source.j00[key_to_modify];
new_value = modify(current_value);

kuzzle_doc._source.j00[key_to_modify] = new_value;


try {
        const response = await kuzzle.document.update(
            i,
            c,
            d,
            {
            j00: kuzzle_doc._source.j00
            }
        );
        console.log('response',response);
} catch (error) {
        console.error("await kuzzle.document.update ....", error);
}

1. Is this the correct way to update the json ?
2. what about a nested json ? like :

   { 
    'a': 'dsds',
    'b': 'rer',
    'c': 'yytyh hgvhg',
    'd': 'koo kllkl vv'
    'e': {}
   }
   

What's the efficient way to update a key in the nested json ?

To update one attribute from a document you can modify the attribute of your document and then send the whole document:

const myDoc = {
  foo: 'bar',
  baz: {
    will: 'smith'
  }
};

myDoc.foo = 'newValue';
myDoc.baz.will = 'anderson';

kuzzle.document.update(
  'index',
  'collection',
  'docId',
  myDoc
);