// PUT /admin/offers/{id}/
{
    "offers": [
        {
            "display_title": "Black Friday 2022",
            "code": "black-friday-2022"
        }
    ]
}
For existing offers, only name , code, display_title and display_description are editable. The example updates display title and code. 
// PUT /admin/offers/{id}/
{
    "offers": [
        {
            "display_title": "Black Friday 2022",
            "code": "black-friday-2022"
        }
    ]
}