[cjus]

Thanks for this. The need for canonical JSON is perhaps the best reason for dropping the signature field from future versions of the spec. However, because only the `to` `from` and `body` fields are required there's no need avoid the format - just don't use the signature field unless the body field contains a single field with serialized data. Certainly, that use would need to be clearly documented.

Again your point is valid and will likely result in the depreciation of the signature field.

Thanks for taking the time to offer feedback.