curl --request POST \
  --url https://api.eflow.team/v1/networks/advertisers/{advertiserId}/users \
  --header 'Content-Type: application/json' \
  --header 'X-Eflow-Api-Key: <api-key>' \
  --data '
{
  "first_name": "John",
  "last_name": "Smith",
  "email": "john@brand.com",
  "account_status": "active",
  "language_id": 1
}
'

{
  "network_advertiser_user_id": 123,
  "network_advertiser_id": 123,
  "first_name": "<string>",
  "last_name": "<string>",
  "email": "<string>",
  "title": "<string>",
  "account_status": "active",
  "work_phone": "<string>",
  "cell_phone": "<string>",
  "language_id": 123,
  "timezone_id": 123,
  "currency_id": "<string>",
  "time_created": 123,
  "time_saved": 123
}