Retrieve a single attribute

{
  "topic": "com.acme/xdk_53/things/twin/commands/retrieve",
  "headers": {},
  "path": "/attributes/location"
}

{
  "topic": "com.acme/xdk_53/things/twin/commands/retrieve",
  "headers": {},
  "path": "/attributes/location",
  "value": {
    "latitude": 44.673856,
    "longitude": 8.261719
  },
  "status": 200
}