Generate dynamic key names

[grational]

I'm trying to convert a json alike the next:

{ "formParameter": [
          {"name": "email", "value": "[email protected]"},
          {"name": "phone", "value": "+01 12 345 67 89"},
          {"name": "address", "value": "1234 Placename"}
      ]
}

into this:

{  "sender": {
       "email": "[email protected]",
       "phone": "+01 12 345 67 89",
       "address": "1234 Placename"
   }
}

but i can't find a way to use the value of &$.formParameter[x].name as the key of the output json.
That is because anything i put before the comma is considered as a simple string (is not evaluated by json2json).

Using XSLT my problem is solvable using the following XSL instruction:

<xsl:element name="{@Name}">

You can find an application of this at:
http://stackoverflow.com/a/7922068/4892253

Is this supported at the moment? Can you suggest how to proceed?

Thank you in advance