curl -H 'Authorization: Bearer <token>' -H 'Accept-Language: en-DE,*' -H 'User-Agent: Mozilla/5.0' -H 'Host: my.remarkable.com' --data "" --compressed 'https://my.remarkable.com/token/user/new'

HTTP/1.1 200 OK
Access-Control-Allow-Headers: Authorization
Access-Control-Allow-Methods: POST
Content-Type: text/html; charset=utf-8
Content-Encoding: gzip
X-Cloud-Trace-Context: b04b025cb021a92f3677094a1c60707f
Vary: Accept-Encoding
Date: Mon, 29 Jan 2018 16:55:23 GMT
Server: Google Frontend
Cache-Control: private
Transfer-Encoding: chunked
Connection: Keep-alive

<token>