Currently, data for non-fungible assets is stored as a simple vector of bytes. It could be good to add some structure to this (see #2 (comment)). The key properties that we'd like to have for NFA data are:

• The data should be serializable into bytes.
• Hash of the data should depend on semantic properties rather than formatting. For example, whitespace or field order changes should not affect data hash.
• The data should be reducible to a display string which reflects internal content. For example, we could iterate over internal fields and show a value for each field.