Categories (Folders)
You can create assets in any folder known by your users, or move an existing asset into a folder. The asset stores the folder information in an attribute called category.
To create or move an asset into a folder, add a category to the asset as an object, using the category attribute. Add the ID of the category.
Sample Asset with Category
{
"name": "NTO Welcome Series Email",
"assetType": {
"id": 207,
"name": "templatebasedemail"
},
"category": { "id": 1234567 }
}