curl --request POST \
  --url 'https://api.stateset.com/api/v1/ap/bills/{id}/approve' \
  --header 'Authorization: Bearer YOUR_API_KEY'

{
  "amount_due": "string",
  "amount_paid": "string",
  "bill_number": "string",
  "created_at": "string",
  "currency": "string",
  "due_date": "string",
  "id": "string",
  "status": "string",
  "subtotal": "string",
  "supplier_id": "string",
  "tax_amount": "string",
  "total_amount": "string"
}