Validation errors on nested models

I am trying to create server-side validations for nested models. Here are my Ember models:

//models/blog.js
export default DS.Model.extend({
  "name": DS.attr('string'),
  "category": DS.belongsTo('category'),
  "posts": DS.hasMany('post')
});

 //models/category.js
export default DS.Model.extend({
  "name": DS.attr('string')
});

 //models/post.js
export default DS.Model.extend({
  "text": DS.attr('string')
});

When saving blog model, I validate all the child models as well.

How should I format ember-friendly error JSON when there is a validation error on one of the child models' attribute?

this is a JSON I produce right now when blog's title is invalid:

{
  "errors": [
    {
      "title": "name",
      "detail": "some error"
    }
  ]
}