```ruby
json.info '<strong>Successfully</strong> subscribed the feed.'

json.category do
  json.id data['category'].id
  json.feeds data['category'].feeds do |feed|
    json.partial! 'feed_for_navigation', feed: feed
  end
end
```

Use the same partial as destroy.
user
```ruby
json.info '<strong>Successfully</strong> subscribed the feed.'

json.data do
  json.partial! 'navigation_data'
end
```
assistant