curl --request POST \
  --url https://preview.intermezzo.ai/gb/organizations/{organization_id}/payrolls/bacs-file/validate \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form file='@example-file'

{
  "valid": true,
  "paymentCount": 0,
  "totalPence": 0,
  "processingDate": "2023-12-25",
  "originatorRef": "<string>",
  "errors": [
    {
      "line": 123,
      "severity": "error",
      "code": "<string>",
      "message": "<string>"
    }
  ],
  "warnings": [
    {
      "line": 123,
      "severity": "error",
      "code": "<string>",
      "message": "<string>"
    }
  ]
}