Sharepoint API to start a new workflow

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Hi all!

Does anyone configured a start worflow in sharepoint using an API?

I've following the tutorial video (https://www.youtube.com/watch?v=C3hC1fAjvAk) to start a subworkflow using MS Flow (now called Power Automate) but when I need to configure the Get Token Action I only have the options in the picture and they are premium.

Anyone with ideas?

Using the json in the column of the item list is not working.
Thank you!