curl -X POST -H "Authorization: Basic YWYxNTY0ZGEtMzQzMS00MjY5LWJlNDUtNzc2OWI3NDM3NjE2" -H "Content-Type: application/json" -d '{
    "extra_fields": ["country","notification_types","external_user_id", "location", "rooted", "ip", "country", "web_auth", "web_p256"], 
    "last_active_since": "1469392779", "segment_name": "Active Users"
}' "https://onesignal.com/api/v1/players/csv_export?app_id=6a8998d5-2af8-4000-8682-738fd0036824"