curl --request POST \
  --url 'https://sandbox.rollfi.xyz/payroll#addSupplementalPayrollLineItem' \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "method": "addSupplementalPayrollLineItem",
  "payrollLineItem": {
    "payPeriodId": "00b8b220-f329-4554-bd7b-d0ef53fc0542",
    "companyId": "8D728FCE-2993-42E0-8797-832C930506E1",
    "userId": "30da3ca7-8b39-4a3c-8ab9-050f17fbcb3b",
    "amount": 10
  }
}
'

{
  "payrollLineItem": {
    "employeeId": "30da3ca7-8b39-4a3c-8ab9-050f17fbcb3b",
    "status": "Ready",
    "message": "The PayrollLineItem for Nelson John has been saved successfully."
  }
}