Mobile Document signature

I have a client that want to add signatures to a page for the manager, picker, driver and Client.

Is there a way to customize the action ‘SignReport’,?

My idea is to save the img’s id to a new DB field(s) so that I can use it later on a report.

for reference there is the normal way of adding a signature

    update container "OrderSummary" {
        ...
        add recordAction "SignReport" {
            behavior = SignReport
            displayName = "Sign"
        }
        ...
    }