curl --request POST \
  --url https://api.dancity.app/api/external/v1/airtime/buy \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'channel: <api-key>' \
  --data '
{
  "product": "MTN Airtime",
  "phone": "08012345678",
  "amount": 525,
  "pin": "1234",
  "customerRef": "<string>",
  "saveAsBeneficiary": true,
  "beneficiaryName": "<string>",
  "promocode": "<string>",
  "deviceKey": "<string>"
}
'

{
  "success": true,
  "message": "<string>",
  "data": "<unknown>"
}