curl --request POST \
  --url https://api-next.ofauth.com/v2/dynamic-rules/sign \
  --header 'Content-Type: application/json' \
  --header 'apiKey: <api-key>' \
  --data '
{
  "endpoint": "<string>",
  "time": 123,
  "user-id": 123
}
'

{
  "signed": {
    "sign": "<string>",
    "time": "<string>",
    "app-token": "<string>",
    "user-id": "<string>"
  },
  "is_public": true,
  "is_early_access": true
}