Deserializing JSON in an expression-bodied member
We can of course try to optimize it but this would be only an ugly workaround trying to minimize the flaws of the current design. 

There are more questions then answers:


Why is the the parameter dynamic?
Are you trying to parse json? JObject suggests you are and I'm pretty sure this is the wrong way to do it.
Why do you use such a crazy syntax for a method? The expression bodied members are meant for one-liners and not for such huge blocks.
Why don't you deserialize the object with JsonConvert.Deserialize?
Why don't you decorate the properties like SoftwareVersion with the appropriate attribute like [JsonProperty(PropertyName = "swVersion")]


You should rethink the entire parsing process and not just this helper method.