[vindex]

It worked now.
I had to write "myuser", "mypass", "serveraddress" and "type" in "".

Spoiler:

[ {
  "proxy" : {
    "username" : "myuser",
    "password" : "mypass",
    "port" : myport,
    "address" : "serveraddress",
    "type" : "SOCKS5",
    "preferNativeImplementation" : false,
    "connectMethodPrefered" : false
  },
  "rangeRequestsSupported" : true,
  "filter" : null,
  "pac" : false,
  "reconnectSupported" : false,
  "enabled" : true
} ]