Hi @rickhurlbatt
I find it difficult to follow you without a clone-app example to look into.
However, reading what you’ve written, I’d suggest to try to convert explicitly your BlobMedia image content to a BASE64 string in your list of dicts, then convert it back to binary in the client.
This way your json.dumps(data) serialisation should work and - in the end - you are just doing explicitly what you were implicitly expecting it to do: convert a binary object to somw sort of string.