How to add custom fields into the Brands page in admin back office?

[bkprestashop]

Hello, 

I'm trying to add a custom field into the Brands page in the admin back office. Previously, I successfully added a custom dropdown box in the Category page in the admin back office with 

hookActionCategoryFormBuilderModifier

and handled the update and create by using 

hookActionAfterCreateCategoryFormHandler
hookActionAfterUpdateCategoryFormHandler

 

However, when trying to do the same for the Brand page, nothing seems to happen. Is there another way or another hook to do this?