Manual deserialization of CANbus messages

Hello - new to this forum so please point me in the right direction if this is the wrong place - we are using pyuavcan-v0 1.0.0.dev35 in a distributed ROS2 environment. I am not the developer of the specific code, but we have lost the ability to parse our uavcan messages - I can still see the data in a candump, however I am wondering if there is documentation that will help me manually translate these messages a stop gap to our larger solution.

I know there is documentation somewhere on the structure of these CAN messages, however i am not able to locate.