...m date,to date)
{
    "SearchRequest": {
        "FileCodes": null,
        "CurrencyCodes": null,
        "ExchangeCodes": null,
        "StrikePrice": {
            "@odata.type": "#ThomsonReuters.Dss.Api.Search.NumericRangeComparison",
            "From":2000,
            "To": 2200
        },
        "ExpirationDate": {
            "@odata.type": "#ThomsonReuters.Dss.Api.Search.DateValueComparison",
            "ComparisonOperator": "GreaterThanEquals",
            "Value": "2019-12-31"
        },
        "IdentifierType": "Ric",
        "Identifier": "SPX*",
        "PreferredIdentifierType": "Ric",
        "UnderlyingRic": ".SPX"
    }
}