failed request:

curl 'https://hot-rox-admin.3scale.net/buyers/accounts/2445582648817/applications' \
-XPOST \
-H 'Cookie: _gali=submit-new-app; intercom-session-d2rqzz73=Z1FFT2xTQWhCV2J5M2lKaFJ5Zm1mMW4zYy82OEZERnFMaDVTSy83dmpUWDJpbFVmclZ1b1QzZW1uMmZzU3l1Yi0taDlJeS9GNEZYRHFqUm0vc0JzeTVNQT09--57c29c0770c9d1ec5083e7e2eeffc627d4371662; __insp_slim=1543856234200; _ga=GA1.2.188548853.1502201333; _gid=GA1.2.926880764.1543833136; amplitude_id_1ecb949ca283016361666f3668dce21a3scale.net=eyJkZXZpY2VJZCI6IjJkNGI5YzNhLTJhMmUtNDc5ZC05YjJkLTVmOGE3YzAxNjBhMFIiLCJ1c2VySWQiOiIyNDQ1NTgxNDc2MzgzIiwib3B0T3V0IjpmYWxzZSwic2Vzc2lvbklkIjoxNTQzODUyMDQyMjQ2LCJsYXN0RXZlbnRUaW1lIjoxNTQzODU2MjM0MTc2LCJldmVudElkIjozLCJpZGVudGlmeUlkIjoxNzcyMCwic2VxdWVuY2VOdW1iZXIiOjE3NzIzfQ==; amplitude_idundefined3scale.net=eyJvcHRPdXQiOmZhbHNlLCJzZXNzaW9uSWQiOm51bGwsImxhc3RFdmVudFRpbWUiOm51bGwsImV2ZW50SWQiOjAsImlkZW50aWZ5SWQiOjAsInNlcXVlbmNlTnVtYmVyIjowfQ==; ajs_group_id=2445581331813; ajs_user_id=2445581476383; _system_session=ZG10RDBOQXVCQVpjTW5JbFI0OVd2VHdJeCtZNkZ6SEhLeWtQRTNyb1JTbDdmQjYwTS9wWW9uVStybDh3QkJsTHR2NjdFOXNMckJRYUhOcTNabEhwVDJJK1J4Z09WYW4xSFNIM2lLK0k4Y0pyVUZRSEVVNHNkcVRRUUVrTW5JbjdnVzBiQXI1Y0NJQ05GdUpnVUEyWW1QbFF1QWlEQ1ZOczNRelkwUTZJenQ3TktGVWFsZHFvcERlYUVUUy8ybXFpRnl5WmhZWFU0Z1pjWlU4blhQNmkyRmdhVW5MakFBMnovZGRFZXRtTHdNWT0tLW9WSGlic1hXSFFEblBZMjB5TnQxc1E9PQ%3D%3D--41d4b7ad74caca466a7da262db7ea6a49e4b61b5; _gat=1; ajs_anonymous_id=%220ae0ca9f-152d-41c6-aae4-2ed4d9b96803%22; user_session=Imx4UVE0OG1jb3g0Q0QxN1AwaXNCbEtQMUFHZDFwaDRlX3JKb1NwTk5fVkki--e8ff158b8cacaf45b2a53f32677d62094eaa56dc; __insp_norec_sess=true; __insp_nv=false; __insp_targlpt=RGFzaGJvYXJkcyAtIFNob3cgfCBSZWQgSGF0IDNzY2FsZSBBUEkgTWFuYWdlbWVudA%3D%3D; __insp_targlpu=aHR0cHM6Ly9tdWx0aXRlbmFudC1hZG1pbi4zc2NhbGUubmV0L3AvYWRtaW4vZGFzaGJvYXJk; __insp_wid=1256940468; __insp_uid=2353293586; _mkto_trk=id:516-GHI-083&token:_mch-3scale.net-1502282474640-57079; optimizelyBuckets=%7B%223179490516%22%3A%223179490517%22%7D; optimizelySegments=%7B%22298782456%22%3A%22referral%22%2C%22298858330%22%3A%22false%22%2C%22298882186%22%3A%22safari%22%2C%222652150950%22%3A%22safari%22%2C%222653160154%22%3A%22false%22%2C%222656910671%22%3A%22referral%22%7D; mapping-rules=true; authentication-settings-toggle-cookie=true; policies-rules=true; intercom-lou-d2rqzz73=1; optimizelyEndUserId=oeu1502282473138r0.5484161472005501; intercom-id-d2rqzz73=b0a58de2-754c-4fb3-8df0-91f51e291748' \
-H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8' \
-H 'Content-Type: application/x-www-form-urlencoded' \
-H 'Origin: https://hot-rox-admin.3scale.net' \
-H 'Content-Length: 258' \
-H 'Accept-Language: en-us' \
-H 'Host: hot-rox-admin.3scale.net' \
-H 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0 Safari/605.1.15' \
-H 'Referer: https://hot-rox-admin.3scale.net/buyers/accounts/2445582648817/applications/new' \
-H 'Accept-Encoding: br, gzip, deflate' \
-H 'Connection: keep-alive' \
--data 'utf8=%E2%9C%93&authenticity_token=AQSQeqlFmUsXgMWsDRqY1gdnpUdV03kBWpqM1wu1iO8iyb0GgIqKYYfu%2BguAkC2htzdGVvQJjtebY%2FWm%2FT3COA%3D%3D&cinstance%5Bplan_id%5D=2357355849140&cinstance%5Bname%5D=Another&cinstance%5Bdescription%5D=another&commit=Create+Application'

Network tab:

Summary
URL: https://hot-rox-admin.3scale.net/buyers/accounts/2445582648817/applications
Status: 404 Not Found
Source: Network
Address: 50.19.254.27:443

Request
POST /buyers/accounts/2445582648817/applications HTTP/1.1
Cookie: _gali=submit-new-app; intercom-session-d2rqzz73=Z1FFT2xTQWhCV2J5M2lKaFJ5Zm1mMW4zYy82OEZERnFMaDVTSy83dmpUWDJpbFVmclZ1b1QzZW1uMmZzU3l1Yi0taDlJeS9GNEZYRHFqUm0vc0JzeTVNQT09--57c29c0770c9d1ec5083e7e2eeffc627d4371662; __insp_slim=1543856234200; _ga=GA1.2.188548853.1502201333; _gid=GA1.2.926880764.1543833136; amplitude_id_1ecb949ca283016361666f3668dce21a3scale.net=eyJkZXZpY2VJZCI6IjJkNGI5YzNhLTJhMmUtNDc5ZC05YjJkLTVmOGE3YzAxNjBhMFIiLCJ1c2VySWQiOiIyNDQ1NTgxNDc2MzgzIiwib3B0T3V0IjpmYWxzZSwic2Vzc2lvbklkIjoxNTQzODUyMDQyMjQ2LCJsYXN0RXZlbnRUaW1lIjoxNTQzODU2MjM0MTc2LCJldmVudElkIjozLCJpZGVudGlmeUlkIjoxNzcyMCwic2VxdWVuY2VOdW1iZXIiOjE3NzIzfQ==; amplitude_idundefined3scale.net=eyJvcHRPdXQiOmZhbHNlLCJzZXNzaW9uSWQiOm51bGwsImxhc3RFdmVudFRpbWUiOm51bGwsImV2ZW50SWQiOjAsImlkZW50aWZ5SWQiOjAsInNlcXVlbmNlTnVtYmVyIjowfQ==; ajs_group_id=2445581331813; ajs_user_id=2445581476383; _system_session=ZG10RDBOQXVCQVpjTW5JbFI0OVd2VHdJeCtZNkZ6SEhLeWtQRTNyb1JTbDdmQjYwTS9wWW9uVStybDh3QkJsTHR2NjdFOXNMckJRYUhOcTNabEhwVDJJK1J4Z09WYW4xSFNIM2lLK0k4Y0pyVUZRSEVVNHNkcVRRUUVrTW5JbjdnVzBiQXI1Y0NJQ05GdUpnVUEyWW1QbFF1QWlEQ1ZOczNRelkwUTZJenQ3TktGVWFsZHFvcERlYUVUUy8ybXFpRnl5WmhZWFU0Z1pjWlU4blhQNmkyRmdhVW5MakFBMnovZGRFZXRtTHdNWT0tLW9WSGlic1hXSFFEblBZMjB5TnQxc1E9PQ%3D%3D--41d4b7ad74caca466a7da262db7ea6a49e4b61b5; _gat=1; ajs_anonymous_id=%220ae0ca9f-152d-41c6-aae4-2ed4d9b96803%22; user_session=Imx4UVE0OG1jb3g0Q0QxN1AwaXNCbEtQMUFHZDFwaDRlX3JKb1NwTk5fVkki--e8ff158b8cacaf45b2a53f32677d62094eaa56dc; __insp_norec_sess=true; __insp_nv=false; __insp_targlpt=RGFzaGJvYXJkcyAtIFNob3cgfCBSZWQgSGF0IDNzY2FsZSBBUEkgTWFuYWdlbWVudA%3D%3D; __insp_targlpu=aHR0cHM6Ly9tdWx0aXRlbmFudC1hZG1pbi4zc2NhbGUubmV0L3AvYWRtaW4vZGFzaGJvYXJk; __insp_wid=1256940468; __insp_uid=2353293586; _mkto_trk=id:516-GHI-083&token:_mch-3scale.net-1502282474640-57079; optimizelyBuckets=%7B%223179490516%22%3A%223179490517%22%7D; optimizelySegments=%7B%22298782456%22%3A%22referral%22%2C%22298858330%22%3A%22false%22%2C%22298882186%22%3A%22safari%22%2C%222652150950%22%3A%22safari%22%2C%222653160154%22%3A%22false%22%2C%222656910671%22%3A%22referral%22%7D; mapping-rules=true; authentication-settings-toggle-cookie=true; policies-rules=true; intercom-lou-d2rqzz73=1; optimizelyEndUserId=oeu1502282473138r0.5484161472005501; intercom-id-d2rqzz73=b0a58de2-754c-4fb3-8df0-91f51e291748
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Content-Type: application/x-www-form-urlencoded
Origin: https://hot-rox-admin.3scale.net
Content-Length: 258
Accept-Language: en-us
Host: hot-rox-admin.3scale.net
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0 Safari/605.1.15
Referer: https://hot-rox-admin.3scale.net/buyers/accounts/2445582648817/applications/new
Accept-Encoding: br, gzip, deflate
Connection: keep-alive

Response
HTTP/1.1 404 Not Found
Content-Type: text/html; charset=utf-8
Vary: Accept-Encoding
Set-Cookie: _system_session=RDdqRXRINlVJNURhM1hZVGh6ZWdjY28zNVZnUHlzWUd1dm50ejlkemJ3QlI4VzdSLzQxWk5EL1p3YlNPNTQ4OEZRaHhjN3EwL1RkM2lFeUpsSU5MMnZ2eHNpRWVOYkl0RUJBN2RvTTViaVRoOVVzaFA0MmdrdStzTHg0ckQ4TFo2bnJDNVNOR2FhWTZyR1dJMXlDUUhObFlBRHhmV2J5SHp4N0paWW5JKytYbXl0SGErUVYvcXpsTU4rU25yS3ovaXR3UW0yR3dSOElySkZjZVRaZlcvV3doNElFVE5iN3MrWlN4K0lnaTVHaz0tLTd6YnVpaWdGcHM0M0FYTDhqZlJIaWc9PQ%3D%3D--9cec64a786924c3f5855d6cf4879223186eb9bf7; path=/; secure; HttpOnly
Content-Encoding: gzip
X-XSS-Protection: 1; mode=block
Transfer-Encoding: Identity
Cache-Control: no-cache
Date: Mon, 03 Dec 2018 16:57:24 GMT
Connection: keep-alive
X-Content-Type-Options: nosniff
X-Frame-Options: DENY
X-Runtime: 0.111591
X-Request-Id: 030866fe-738a-4dee-8a29-394754331496
Strict-Transport-Security: max-age=15552000
X-Served-By: mt02.va.3sca.net

Request Data
MIME Type: application/x-www-form-urlencoded
utf8: ✓
authenticity_token: AQSQeqlFmUsXgMWsDRqY1gdnpUdV03kBWpqM1wu1iO8iyb0GgIqKYYfu+guAkC2htzdGVvQJjtebY/Wm/T3COA==
cinstance[plan_id]: 2357355849140
cinstance[name]: Another
cinstance[description]: another
commit: Create Application

Kibana log:

https://kibana.3sca.net/goto/051129e555809036c588de7fbe2c98c5