message Data {
  enum Env {
    prod = 0;
    staging = 1;
    dev = 2;
  }

  required Env env = 1;
  optional string node_name = 2;
  required string pryin_version = 3;
  optional string app_version = 4;
  repeated Interaction interactions = 5;
  optional SystemMetrics system_metrics = 6;
}