json: cannot unmarshal object into Go value of type []json.RawMessage

[narkan]

I can't work out how to format the payload. I've tried this:

    include( plugin_dir_path( __FILE__ ) . 'StackPath.php' );
    $stackpath = new StackPath\StackPath( "my-default-stack-38343c", SP_CLIENT_IDZZ, SP_CLIENT_SECRETZZ );


    $response2 = $stackpath->post( "cdn/v1/stacks/my-default-stack-38343c/purge", [
        "json" => [ "items" => [
            "purgeAllDynamic" => true,
            "invalidateOnly" => false,
            "recursive"=>true,
            "url" =>"https://thecommunitychurch.online"
        ] ]
    ] );

But I get the response: "json: cannot unmarshal object into Go value of type []json.RawMessage"

If I remove the json outer wrapper:

    $response2 = $stackpath->post( "cdn/v1/stacks/my-default-stack-38343c/purge", [
        "items" => [
            "purgeAllDynamic" => true,
            "invalidateOnly" => false,
            "recursive"=>true,
            "url" =>"https://thecommunitychurch.online"
        ]
    ] );

the response is "Items must be provided"

If I send it without the "items" wrapper I get the same: "Items must be provided"

    $response2 = $stackpath->post( "cdn/v1/stacks/my-default-stack-38343c/purge", [
            "purgeAllDynamic" => true,
            "invalidateOnly" => false,
            "recursive"=>true,
            "url" =>"https://thecommunitychurch.online"
        
    ] );

Any help would be appreciated ;)

[Striker007]

items is an array of associative arrays (additional square brackets)

insted of
["json" => ["items" => ["url" => "..."]]];
we need
["json" => ["items" => [["url" => "..."]]]];