This is how Cosmos (https://cosmos.network/) deals with signing transactions, caused _major_ headaches for me trying to figure out why my signatures were invalid when sending them from Node.js
I did something similar for a project that had clients in go and node. I solved this by flattening the object key paths to strings and sorting the keys, basically. You need to build that into the client serialization/deserialization, it feels clunky but I had 0 issues and has been working smoothly for a long while now.