I want to create text input remotely

i have been see this

but where i can get documentation about this??

{"seg":{"n":"Your new scrolling text"}}

im not found on wled guide on this

https://kno.wled.ge/interfaces/json-api/

i have been created animation with http request how i can back to previous page after click
because the wled response like this xml page

im using for call presets
so how i can auto back from previous page??

use POST for JSON API

thanks i have been solved by myself