'How to add a Javascript code in my page October CMS

I need to integrate a code given by a supplier into my page and this code is in the form The code here .

I tried to put it in the text editor in code format, but every time I save it disappears.

Do you know how I can do this? This code displays messages and should only be on this page.

Thank you very much for your help.

octobercms

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