This API lets you "drill" into what you are trying to update.

update-api.js

update({
  books: {
    24: {
      name: 'Lord of the Rings'
    }
  }
});

update('books', {
  24: {
    name: 'Lord of the Rings'
  }
});

update('books.24', {
  name: 'Lord of the Rings'
});

// deletes too

deleteResources({
  books: {
    lists: ['blah'],
  },
});

deleteResources('books.lists', ['blah']);
deleteResources('books.resources', [1, 50]);