Hi @vicenzodemartino-9989
Welcome to Microsoft Q&A Platform,
If the syntax and parameters are correct you shouldn't get a 404, please check again.
I'd suggest checking the examples from the article below and try them directly from the browser using the "Try It" option (you'll be redirect to the Azure Portal):
I hope this helps!
----------
Please don’t forget to "Accept the answer" and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.