Cross Scaling Factor for PriceHistoryExtractionRequest

Hello!

How can I get cross scaling factor for PriceHistoryExtractionRequest (https://hosted.datascopeapi.reuters.com/RestApi/v1/Extractions/ExtractWithNotes)?

For example, I made the following query :

{
  "ExtractionRequest": {
    "@odata.type": "#ThomsonReuters.Dss.Api.Extractions.ExtractionRequests.PriceHistoryExtractionRequest",
    "ContentFieldNames": [
      "Ask Price",
      "Cross Scaling Factor"
    ],
    "IdentifierList": {
      "@odata.type": "#ThomsonReuters.Dss.Api.Extractions.ExtractionRequests.InstrumentIdentifierList",
      "InstrumentIdentifiers": [
        {
          "Identifier": "JPYUSD=X",
          "IdentifierType": "Ric"
        }
      ],
      "ValidationOptions": null,
      "UseUserPreferencesForValidationOptions": false
    },
    "Condition": {
      "ReportDateRangeType": "Range",
      "QueryStartDate": "2021-03-12T00:00:00.000Z",
      "QueryEndDate": "2021-04-12T23:59:59.000Z"
    }
  }
}

and I received error

{"error": {"message": "Validation Error:\r\n\r\nInvalid content FieldName \"Cross Scaling Factor\""}}

If used "FXIR Scaling Factor", I also receive error:

{"error": {"message": "Validation Error:\r\n\r\nInvalid content FieldName \"FXIR Scaling Factor\""}}