curl --request POST \
  --url https://api.example.com/exchange/convert \
  --header 'Content-Type: application/json' \
  --data '
{
  "amount": "750.00",
  "from": "USD",
  "to": "NGN"
}
'

{
  "data": {
    "converted_amount": "100.00"
  }
}