Send any request

[!NOTE] Note: examples for first-send operations intentionally omit documentID, because it is assigned by server.

curl -X POST "http://127.0.0.1:8008/<route>" \
  -H "Content-Type: application/x-www-form-urlencoded" \
  --data-urlencode "data=<BASE64_JSON>" \
  --data-urlencode "sign=<SIGN>"