curl --request PUT \
  --url https://api.example.com/invoices/{invoiceId}/settle \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'x-environment: <x-environment>' \
  --data '
{
  "amount": 123,
  "note": "<string>",
  "paymentSource": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  },
  "invoiceReference": {
    "invoiceId": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  }
}
'

{
  "currency": "<string>",
  "createdAt": "2023-11-07T05:31:56Z",
  "customer": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "handle": "<string>",
    "name": "<string>",
    "billingAddress": {
      "street1": "<string>",
      "street2": "<string>",
      "postalCode": "<string>",
      "city": "<string>",
      "county": "<string>",
      "country": "<string>",
      "state": "<string>"
    }
  },
  "memo": "<string>",
  "handle": "<string>",
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "date": "2023-12-25",
  "dueDate": "2023-12-25",
  "updatedAt": "2023-11-07T05:31:56Z",
  "items": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "quantity": 123,
      "unitAmount": 123,
      "sku": "<string>",
      "title": "<string>",
      "description": "<string>",
      "periodStart": "2023-12-25",
      "periodEnd": "2023-12-25",
      "amount": 123,
      "taxAmount": 123,
      "tax": {
        "taxable": true,
        "taxCode": "<string>",
        "taxRate": 123
      },
      "discount": {
        "percentage": 123,
        "amount": 123
      }
    }
  ],
  "settlements": [
    {
      "date": "2023-12-25",
      "amount": 123,
      "reference": "<string>",
      "note": "<string>"
    }
  ],
  "totalExclVat": 123,
  "totalVat": 123,
  "totalInclVat": 123,
  "totalDue": 123
}