curl --request POST \
  --url https://api.daraa.io/purchases/{id}/approve \
  --header 'Content-Type: application/json' \
  --data '{
  "action": "approve",
  "comments": "<string>",
  "delegateToId": "<string>"
}'

{
  "id": "<string>",
  "shopperId": "<string>",
  "orderNumber": "<string>",
  "externalPoNumber": "<string>",
  "status": "draft",
  "approvalStatus": "not_required",
  "approvalChain": {
    "id": "<string>",
    "name": "<string>",
    "steps": [
      {
        "id": "<string>",
        "stepNumber": 123,
        "approverType": "user",
        "approverId": "<string>",
        "approverName": "<string>",
        "thresholdAmount": 123,
        "isRequired": true
      }
    ],
    "isActive": true
  },
  "currentApprover": "<string>",
  "items": [
    {
      "sku": "<string>",
      "name": "<string>",
      "quantity": 123,
      "unitPrice": 123,
      "totalPrice": 123
    }
  ],
  "subtotal": 123,
  "tax": 123,
  "shipping": 123,
  "total": 123,
  "currency": {
    "id": 123,
    "name": "<string>",
    "description": "<string>",
    "rate": "<string>",
    "base": true,
    "active": true
  },
  "convertedTotal": 123,
  "shippingAddress": {
    "name": "<string>",
    "street1": "<string>",
    "city": "<string>",
    "state": "<string>",
    "zip": "<string>",
    "country": "<string>"
  },
  "billingAddress": {
    "name": "<string>",
    "street1": "<string>",
    "city": "<string>",
    "state": "<string>",
    "zip": "<string>",
    "country": "<string>"
  },
  "paymentMethod": {
    "type": "credit_card",
    "lastFour": "<string>",
    "brand": "<string>",
    "expiryMonth": 123,
    "expiryYear": 123
  },
  "requestedDeliveryDate": "2023-12-25",
  "urgency": "low",
  "notes": "<string>",
  "approvalHistory": [
    {
      "id": "<string>",
      "stepId": "<string>",
      "approverId": "<string>",
      "approverName": "<string>",
      "action": "approved",
      "comments": "<string>",
      "actionDate": "2023-11-07T05:31:56Z"
    }
  ],
  "createdAt": "2023-11-07T05:31:56Z",
  "updatedAt": "2023-11-07T05:31:56Z",
  "approvedAt": "2023-11-07T05:31:56Z"
}