Retrieve a transactions attachments

Example response

{
  "data": [
    {
      "id": "c390a94f-2309-4cdf-8d02-b0c5304d9f66",
      "fileType": "text/html",
      "fileName": "receipt.png",
      "url": "https://s3.amazon.com/receipt.png"
    }
  ]
}