Set Preferences

curl --request POST \
  --url http://localhost/api/preferences/save_preferences \
  --header 'Content-Type: application/json' \
  --data '
{
  "default_stream": {
    "host": "192.168.2.1",
    "port": 5600
  },
  "suggest_host": true,
  "frequency_offset": 0
}
'

{
  "success": true
}