curl --request POST \
  --url http://localhost:3000/v1/admin/partners/brands/{id}/reject \
  --header 'Content-Type: application/json' \
  --data '
{
  "rejection_reason": "<string>"
}
'

{
  "success": true,
  "partner_brand": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "brand_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "company_name": "<string>",
    "contact_email": "jsmith@example.com",
    "contact_phone": "<string>",
    "business_type": "<string>",
    "company_logo_url": "<string>",
    "website_url": "<string>",
    "return_address_line1": "<string>",
    "return_address_line2": "<string>",
    "return_city": "<string>",
    "return_state": "<string>",
    "return_postal_code": "<string>",
    "return_country_code": "<string>",
    "approved_at": "2023-11-07T05:31:56Z",
    "rejection_reason": "<string>",
    "default_commission_rate_ambient": 123,
    "default_commission_rate_cold": 123,
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  }
}