curl --request POST \
  --url 'https://api.stateset.com/api/v1/purchase-orders/{id}/acknowledge' \
  --header "Authorization: Bearer $STATESET_API_KEY" \
  --header 'Content-Type: application/json' \
  --data '{
  "supplier_reference": "string"
}'

{
  "approved_by": "string",
  "created_at": "2026-08-31T14:22:05Z",
  "currency": "USD",
  "discount_amount": "5.00",
  "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "items": [
    {
      "created_at": "2026-08-31T14:22:05Z",
      "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
      "line_total": "49.00",
      "name": "Two-Person Tent",
      "product_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
      "purchase_order_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
      "quantity_ordered": "string",
      "quantity_received": "string",
      "sku": "SKU-TENT-2P-GRN",
      "supplier_sku": "string",
      "unit_cost": "49.00"
    }
  ],
  "payment_terms": "string",
  "po_number": "ORD-10042",
  "shipping_cost": "8.00",
  "status": "pending",
  "subtotal": "98.00",
  "supplier_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "supplier_reference": "string",
  "tax_amount": "4.12",
  "total": "102.12"
}