Batch multiple commands into one call
The single parameter "json" must be a well-encoded JSON string, where the top level is an array of plain objects.
Each object then represents the name-value pairs that you would normally send via normal POST
The response is another JSON encoded string that is an array of plain objects.
Each object or error string corresponds to the objects sent in the request in the same order.
|JSON Encoded String||Y|
|JSON Encoded String|