create a user defined template

I want to create a use defined ElektronTimeseriesReportTemplate using REST API,

to change the format for a specific field: Settlement Price

but failed because of ("DecimalPlaces", 9), ("DecimalSeparator", "Period"),("IntegerPlaces", 25)

java code like below:

HttpPost httppost = new HttpPost(urlHost + "/Extractions/ElektronTimeseriesReportTemplates"); 
            httppost.addHeader("content-type", "application/json;odata.metadata=minimal");
            httppost.addHeader("Authorization", "Token " + sessionToken);
             // Note: content fields are specific to each report template type
            JSONOrderedObject reportTemplateJSONObject = new JSONOrderedObject()
                .put("@odata.type", "#ThomsonReuters.Dss.Api.Extractions.ReportTemplates.ElektronTimeseriesReportTemplate")
                .put("ShowColumnHeaders", true)
                .put("CompressionType", "GZip")
                .put("Name", reportTemplateName )
                .put("Headers", new JSONArray() )
                .put("Trailers", new JSONArray() )
                .put("ContentFields", new JSONArray()
                .put( new JSONObject()
                            .put("FieldName", "Settlement Price")
                            .put("Label", "")
                            .put("Justification", "Center")
                            .put("WidthStyle", "VariableWidth")
                            .put("Format", new JSONObject()
                            .put("@odata.type", "#ThomsonReuters.Dss.Api.Extractions.ReportTemplates.ContentFieldNumberFormat")

                            .put("DecimalPlaces", 9)
                            .put("DecimalSeparator", "Period")
                            .put("IntegerPlaces", 25)
                            .put("UseLeadingZero", false)
                            .put("NegativeSignPosition", "Before")
                            .put("UseThousandSeparator", false)
                            .put("UseTrailingZero", false)
                            ))

                )
                .put("Condition", new JSONOrderedObject()
                        .put( "StartDate", StartDate + "T00:00:00.000-00:00" )
                        .put( "EndDate", EndDate + "T00:00:00.000-00:00" ));