gRPC json data in camel case

I received a json data from gRPC and it is on Pascal case. I want it to be in camel case. I am using angular to access the gRPC service. Even when i serialize and convert the result into camel case, the output in angular is always in Pascal Case. Below are the details.

protobuf message

message EmployeeRecord {
   string record = 1;
}

gRPC service

var serializedResult = JsonConvert.SerializeObject(fields, new JsonSerializerSettings
{
   ContractResolver = new CamelCasePropertyNamesContractResolver()
});

var result = new Protos.EmployeeRecord() { record = serializedResult };

return result;

angular code

public getEmployees() : void{
    this.response = "";
    const service = new EmployeeServiceClient(this.gRPCUrl, null);
    const request = new EmployeeRecord();
    request.setMesssage('');

    service.fields(request, null, (err, response: EmployeeRecord) => {
        if (err) {
          console.log(err);
        }
        else {
          this.response = response.toObject().record;
        }
    });
  }

the result in this.response is always in Pascal Case