How to get thing name from MQTT topic in AWS Iot Analytics pipeline?

I have created the following in AWS Iot Analytics:

Channel: Iot Core topic pattern => $aws/things/+/shadow/update/accepted
Pipeline: Fed from previous channel, selects attributes from message
Datastore to save messages

The incoming message to the channel is a shadow update/accepted and looks like this:

{
  "state": {
    "reported": {
      "active": false,
      "telemetry": {
        "temperature": 72,
        "humidity": 58,
        "occupancy": 28
      },
      "config": null
    }
  },
  "metadata": {
    "reported": {
      "active": {
        "timestamp": 1533059587
      },
      "telemetry": {
        "temperature": {
          "timestamp": 1533059587
        },
        "humidity": {
          "timestamp": 1533059587
        },
        "occupancy": {
          "timestamp": 1533059587
        }
      },
      "config": {
        "timestamp": 1533059587
      }
    }
  },
  "version": 89,
  "timestamp": 1533059587,
  "clientToken": "..."
}

I want to extract the thing name from the topic structure, which I have as a wild card here:

$aws/things/+/shadow/update/accepted

Is there any way to do this or must it be included in the message body directly if I want to use it here for processing?

Thanks.

Solution

Apparently this is done by enriching the payload that leaves IOT Core by adding to the SQL statement in the IOT Core Rule that transmits payloads to IOT Analytics.