Manually convert CAN-bus specification documents to JSON

I'm looking for a technical person that can understand a highly technical CAN-bus protocol documents and extract technical details that need to be written down in JSON. Because these documents are textual, like a technical manual, creating the JSON is a manual and very tedious job.

The CAN-bus protocol documents I have specify about 500 different messages. Messages are binary and the specification defines where the data values are, how many bits/bytes they use, and which format they have.

Each message has a number of general values (e.g. message ID number, size, type, ...), followed by a variable number so called 'fields'. Examples of what type of value a field carries: voltage, speed, switch on/off, latitude, longitude, tank level, ... Also, a field can be an enumeration (like in many programming languages) that give meaning to each of the integer values of the field.

The resulting JSON file must contain an entry per CAN-bus message that specifies the message in detail. Enumerations (see above) must be specified in a separate JSON array. Field formats (e.g. integer, floating point, ...) must also be specified in a separate JSON array.

The JSON must be similar to: https://github.com/canboat/canboat/blob/master/analyzer/pgns-v2.json

It is extremely important that no mistakes are made in the conversion between CAN-bus documents and JSON file. I'd like to know how you will keep the number of errors to a minimum.