How to use QueryNamedPropertyHistory service with API call

Hi community,

I've been trying to use the service; QueryNamedPropertyHistory() through an API call but not having any success. These are the details of my call:

Method: POST

Url: http://xx-xxx-xxx-xxx/Thingworx/Things/ThingName/Services/QueryNamedPropertyHistory?appKey==xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx…

Body:

params = {

      "oldestFirst": false,

      "maxItems": 50,

      "endDate": null,

      "startDate": null,

      "query": null,

      "propertyNames" : {

      "rows": [{

          "name": "propertyName",

          "description": "propertyDescription"

      }],

      "dataShape": {

          "fieldDefinitions": {

              "name": {

                  "name": "name",

                  "aspects": {},

                  "description": "",

                  "baseType": "STRING",

                  "ordinal": 1

              },

              "description": {

                  "name": "description",

                  "aspects": {},

                  "description": "",

                  "baseType": "STRING",

                  "ordinal": 2

              }

          }

      }

  }

}

Below is my response: I would expect to see the propertyName in the response data alongside the 'timestamp' field. Does anyone have any advice?

Thanks

Andy