curl --request POST \
  --url https://app.herondata.io/api/end_user_enrichers/definitions/{enricher_definition_name}/start_enrich \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "end_user_heron_id": "eun_abc123"
}'

{
  "end_user_id": 123,
  "enricher_name": "<string>"
}