Structs as options

**Is your feature request related to a problem? Please describe.**
We need a way to pass structs into options (and deserialize them on the server side).

**Describe the solution you'd like**
We should be able to use the protobuf Struct type. This will require some custom logic in each language to deserialize.

**Describe alternatives you've considered**
N/A

**Additional context**
None
