curl --request POST \
  --url https://sandbox.hurdlr.com/rest/v5/files/attachment \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: */*' \
  --data '
{
  "attachment": {
    "id": 123,
    "caption": "<string>",
    "date": "2023-11-07T05:31:56Z",
    "amount": 123,
    "entity": "<string>",
    "fileName": "<string>",
    "entityId": 123,
    "fileSize": "24 KB",
    "iconUrl": "https://cdn.sandbox.tight.com/icons/attachments/pdf.svg"
  }
}
'

{
  "errors": {
    "fieldErrors": {},
    "globalErrors": [
      {
        "errorMessage": "<string>"
      }
    ]
  },
  "id": "<string>",
  "webhook": {
    "userId": "<string>",
    "accountantUserId": "<string>"
  }
}