curl --request POST \
  --url http://localhost:3000/api/contact/ingestion/validate \
  --header 'Content-Type: application/json' \
  --data '
{
  "sessionId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "columnMappings": [
    {
      "column": 0,
      "field": "primaryPhone"
    }
  ]
}
'