curl --request POST \
  --url https://api.prequel.co/import/streams/{id}/test-transform \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --data '
{
  "sample": [
    {}
  ]
}
'

{
  "records": [
    {}
  ]
}