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In order for anyone to try out your flow, you will need to edit your post and put the JSON text into a code block – as you have posted it, the double quotes have been changed to “smart-quotes” which are not valid JSON.

The “code” button in this editor is for smaller inline chunks of code – to create a code block, add a line before and after your code text that contains only three backticks, like
```
Please see this post for more information.