curl --request POST \
  --url https://api.getsly.ai/v1/v1/settlement/preview \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "amount": 123,
  "currency": "<string>",
  "destination_currency": "<string>",
  "destination_country": "<string>",
  "preferred_rails": [
    "<string>"
  ]
}
'

{
  "total_fee": "<string>",
  "net_amount": "<string>",
  "rail": "<string>",
  "expected_settlement": "2023-11-07T05:31:56Z"
}