@url=http://127.0.0.1:8080/ddns
@ts=1701014400

###
POST {{url}}/register/581243B8B72744FBAE4EFC472492DDAF?timestamp={{ts}}&key=0540 HTTP/1.1

{
    "ipv6":"240e:391:1a4d:91c0:951c:da68:892d:d904",
    "level":"ipv6"
}