How do you parse your request body? If you parse your request body like this:

var result ComputeConfig
err = json.Unmarshal(reqBody, &result)
if err != nil {
    fmt.Println("Error unmarshaling JSON:", err)
} else {
    fmt.Println("Parsed JSON successfully:", result)
}

You don't need to convert the Config to JSONB using ConvertMapToJSONB(). The json Unmarshal will convert it for you.

I got it working with this.

Maybe you could provide more details about how you parse your request body.