object plumbing commands

updates #138
Yeah, you would be able to put an object described as json, as below, and have it be turned into the native encoding (protobuf) and so on for you.

```json
{
  "links": [
    ["QmbnJp7DAnncbvQEpvPWcCErsoCBHaSn3fM8wS9V7Ty9wR", "149759", "accum-transform"],
    ["QmaksLKRUazZNJzqJkcZoz4dk6uJqVEJbDCUGXgUS88DT3", "1988708", "request"],
    ["QmVA4mvPhsq5C48XBwHB5VE3MLcUSKXyYpmpxxovKDMWGR", "125726", "through2"]
  ],
  "data": "some data"
}
```