The Client side receives a formal JSON content \"{\\\"Id\\\":[1,2,3],\\\"Size\\\":56}\", but get an error in deserialization the byte array.
\"{\\\"Id\\\":[1,2,3],\\\"Size\\\":56}\"
1 Error occurs
JsonDeserializer from RestSharp can not deserialize array. Instead of byte[] use List. For more information see https://github.com/restsharp/RestSharp/wiki/Deserialization
byte[]
List