DocMerge brackets


I am trying to create document from template using DocMerge but getting error that field doesn't exists in module.

Issue is that template have fields like this one: {{Sig_es_:signer:signature}} As once document is created it will be send to be signed and that's the format required for signature.

It looks that because of brackets sugar is expecting to have field name there and when it doesn't recognise it throws error and prevents document to be created.

Is there a way that this value can be escaped?

Only solution I can think about is to create a new field on template's default module and set it to have default value equal to {{Sig_es_:signer:signature}} and then use field name in template. Hopefully doc merge will replace field name with value and it will not throw any error.