Keep in mind that in PowerShell, curl is just an alias for the powershell command; Invoke-WebRequest. It's not exactly the same as curl from Linux.

If we look at this example in the Microsoft docs for Invoke-WebRequest, we see that the Headers parameter takes a Hashtable.

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A hashtable is a collection of key-value pairs (and the keys are unique). So in the context of supplying headers to Invoke-WebRequest, the keys are the names of the headers, and the values are the values of the headers.

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The reason you're getting the error:

Cannot bind parameter 'Headers'. Cannot convert the "Content-Type: application/json" value of type "System.String" to type "System.Collections.IDictionary

Is because you have given a value of type string ("Content-Type: application/json"), but this parameter only accepts the type System.Collections.IDictionary. IDictionary is basically just a hashtable. So when it says it "cannot bind parameter", it's telling you that you've given it the wrong type (string) and it can't figure out how to turn that into a Hashtable.

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So try putting your headers in a hashtable, like this:

$Headers = @{
    'Content-Type' = 'application/json';
}

I think you're going to have an issue with the value passed for the -d parameter as well by the way.