ADD: added json lib and made some changes in the entity class

CMakeLists.txt

@@ -13,6 +13,11 @@ set(TEST_SIMCORE_LIBRARY OFF CACHE INTERNAL "")
   add_subdirectory(libs/SimCore EXCLUDE_FROM_ALL)
 ENDIF()
 
+IF(NOT TARGET nlohmann_json)
+set(JSON_BuildTests_INIT OFF CACHE INTERNAL "")
+  add_subdirectory(libs/nlohmannJSON EXCLUDE_FROM_ALL)
+ENDIF()
+
 
 
  protobuf_generate_cpp(PROTO_PATH  include/Orders/protos CPP_PATH include/Orders/protos HPP_PATH include/Orders/protos)
@@ -73,6 +78,7 @@ target_link_libraries(EntityLibrary
 SimCore
 eigen
 loguru
+nlohmann_json
 )
 # add_dependencies(SimCore protoc)