curl --request POST \
  --url 'https://sandbox.rollfi.xyz/adminPortal#uploadDocument' \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "method": "uploadDocument",
  "companyId": "6FFBAEFF-020F-4F63-A140-0348BD0F0FCB",
  "employeeId": "161978BD-C696-495A-87DC-226B9D0D5A3B",
  "payPeriodId": "D9108BF3-5FFB-433D-89E2-7A4C79972153",
  "fileName": "sample-document.pdf",
  "documentType": "PayStub",
  "fileBase64": "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"
}
'

{}