curl --request POST \
  --url https://api.eflow.team/v1/networks/offers/{offerId}/impressionurl \
  --header 'Content-Type: application/json' \
  --header 'X-Eflow-Api-Key: <api-key>' \
  --data '
{
  "network_affiliate_id": 123
}
'

{
  "impression_url": "<string>"
}