{
 "message": {
  "f_bool": true,
  "f_bools": [],
  "f_bytes": {
   "BYTES": ""
  },
  "f_bytess": [],
  "f_enum": "ENUM_0",
  "f_enums": [],
  "f_float": 0,
  "f_floats": [],
  "f_int32": 123,
  "f_int32s": [],
  "f_int64": 0,
  "f_int64s": [],
  "f_string": "Test message",
  "f_strings": [],
  "f_sub": {
   "f_string": "Nested value"
  },
  "f_subs": []
 },
 "result": true,
 "messages_sent": 10,
 "finish_sending": {
  "result": true
 }
}