POSTed Json body requires surrounding quotes

I have a controller method declared like this:

[HttpPost]
public override IHttpActionResult Post([FromBody]string data)
{
    // do stuff
}

When testing with Advanced Rest Client, or Powershell, I find that my Json body must be surrounded by single quotes. Example: instead of

{"name":"Elroy", "age":99}

I have to provide

'{"name":"Elroy", "age":99}'

If not in quotes, the my method receives an empty value for the "data" parm.

My ARC client DOES specify content-type="application/json"

That's not right, is it? The outer quotes shouldn't be necessary, right?

---

That's correct because JSON is transmitted as a string over the wire, not as an object graph. Hence the need for the quotes to denote that it is a string.

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