mutation addStepWithAttachment ($step_id: String!, $action: String!, $data: String!, $result: String!) {
    updateTestStep(
        stepId: "$step_id",
        step: {
            action: "$action",
            data: "$data"
            result: "$result",
            attachments:
                {
                    add: {
                        data:"ZHVtbXkgY29udGVudA==",
                        filename:"dummy.txt",
                        mimeType:"text/plain"
                    }
                }

        }
    ) {
        addedAttachments
        warnings
    }
}
