{
  "request":   
    "{blocks (from : \"0x1e\", to: \"0x1c\") { number gasUsed gasLimit hash nonce  stateRoot receiptsRoot transactionCount }} ",

  "response": {
    "data":null,
    "errors":
    [{"message":"Exception while fetching data (/blocks) : Invalid params",
      "locations":[{"line":1,"column":2}],"path":["blocks"],
      "extensions":{"errorCode":-32602,"errorMessage":"Invalid params"}}]
    },

  "statusCode": 400

}