curl --request POST \
  --url https://api.example.com/api/dashboard/orders/{order_id}/cod/mark-collected

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "merchant_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "order_number": "<string>",
  "email": "<string>",
  "line_items": [
    {
      "name": "<string>",
      "quantity": 123,
      "price": "<string>",
      "total": "<string>",
      "variant_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "product_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "sku": "<string>",
      "option1": "<string>",
      "option2": "<string>",
      "option3": "<string>",
      "variant_name": "<string>",
      "image_url": "<string>"
    }
  ],
  "subtotal": "<string>",
  "tax": "<string>",
  "shipping_cost": "<string>",
  "discount": "<string>",
  "total": "<string>",
  "currency": "<string>",
  "status": "<string>",
  "payment_status": "<string>",
  "fulfillment_status": "<string>",
  "source": "<string>",
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "customer_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "phone": "<string>",
  "payment_method": "<string>",
  "billing_address": {
    "first_name": "<string>",
    "last_name": "<string>",
    "company": "<string>",
    "address1": "<string>",
    "address2": "<string>",
    "city": "<string>",
    "state": "<string>",
    "postal_code": "<string>",
    "country": "<string>",
    "phone": "<string>"
  },
  "shipping_address": {
    "first_name": "<string>",
    "last_name": "<string>",
    "company": "<string>",
    "address1": "<string>",
    "address2": "<string>",
    "city": "<string>",
    "state": "<string>",
    "postal_code": "<string>",
    "country": "<string>",
    "phone": "<string>"
  },
  "shipping_method": "<string>",
  "tracking_number": "<string>",
  "tracking_url": "<string>",
  "note": "<string>",
  "staff_note": "<string>",
  "shipped_at": "2023-11-07T05:31:56Z",
  "delivered_at": "2023-11-07T05:31:56Z",
  "cancelled_at": "2023-11-07T05:31:56Z"
}