diff --git a/src/utils/conversion_trigger.hpp b/src/utils/conversion_trigger.hpp
index 7ed660f..5229e5e 100644
--- a/src/utils/conversion_trigger.hpp
+++ b/src/utils/conversion_trigger.hpp
@@ -1,7 +1,7 @@
 #pragma once
 
 #include "interfaces/json_storage.hpp"
-#include "interfaces/trigger_types.hpp"
+#include "types/trigger_types.hpp"
 
 namespace utils
 {
diff --git a/src/utils/detached_timer.hpp b/src/utils/detached_timer.hpp
index 224e5a1..636949c 100644
--- a/src/utils/detached_timer.hpp
+++ b/src/utils/detached_timer.hpp
@@ -1,5 +1,7 @@
 #pragma once
 
+#include "types/milliseconds.hpp"
+
 #include <boost/asio/io_context.hpp>
 #include <boost/asio/steady_timer.hpp>
 
@@ -9,8 +11,8 @@
 {
 
 template <class F>
-void makeDetachedTimer(boost::asio::io_context& ioc,
-                       std::chrono::milliseconds delay, F&& fun)
+void makeDetachedTimer(boost::asio::io_context& ioc, Milliseconds delay,
+                       F&& fun)
 {
     auto timer = std::make_unique<boost::asio::steady_timer>(ioc);
     timer->expires_after(delay);
diff --git a/src/utils/json.hpp b/src/utils/json.hpp
new file mode 100644
index 0000000..2ae606f
--- /dev/null
+++ b/src/utils/json.hpp
@@ -0,0 +1,63 @@
+#pragma once
+
+#include <nlohmann/json.hpp>
+
+#include <string_view>
+
+namespace utils
+{
+
+template <class T>
+struct is_vector : std::false_type
+{};
+
+template <class T>
+struct is_vector<std::vector<T>> : std::true_type
+{};
+
+template <class T>
+constexpr bool is_vector_v = is_vector<T>::value;
+
+template <class T>
+std::optional<T> readJson(const nlohmann::json& json)
+{
+    if constexpr (is_vector_v<T>)
+    {
+        if (json.is_array())
+        {
+            auto result = T{};
+            for (const auto& item : json.items())
+            {
+                if (auto val = readJson<typename T::value_type>(item.value()))
+                {
+                    result.emplace_back(*val);
+                }
+            }
+            return result;
+        }
+    }
+    else
+    {
+        if (const T* val = json.get_ptr<const T*>())
+        {
+            return *val;
+        }
+    }
+
+    return std::nullopt;
+}
+
+template <class T>
+std::optional<T> readJson(const nlohmann::json& json, std::string_view key)
+{
+    auto it = json.find(key);
+    if (it != json.end())
+    {
+        const nlohmann::json& subJson = *it;
+        return readJson<T>(subJson);
+    }
+
+    return std::nullopt;
+}
+
+} // namespace utils
diff --git a/src/utils/labeled_tuple.hpp b/src/utils/labeled_tuple.hpp
index 795f37f..a224141 100644
--- a/src/utils/labeled_tuple.hpp
+++ b/src/utils/labeled_tuple.hpp
@@ -170,15 +170,15 @@
 };
 
 template <class... Args, class... Labels>
-void to_json(nlohmann::json& json,
-             const LabeledTuple<std::tuple<Args...>, Labels...>& tuple)
+inline void to_json(nlohmann::json& json,
+                    const LabeledTuple<std::tuple<Args...>, Labels...>& tuple)
 {
     json = tuple.to_json();
 }
 
 template <class... Args, class... Labels>
-void from_json(const nlohmann::json& json,
-               LabeledTuple<std::tuple<Args...>, Labels...>& tuple)
+inline void from_json(const nlohmann::json& json,
+                      LabeledTuple<std::tuple<Args...>, Labels...>& tuple)
 {
     tuple.from_json(json);
 }
diff --git a/src/utils/tstring.hpp b/src/utils/tstring.hpp
index 5b17d98..8f9701a 100644
--- a/src/utils/tstring.hpp
+++ b/src/utils/tstring.hpp
@@ -112,5 +112,21 @@
     }
 };
 
+struct CollectionTimeScope
+{
+    static std::string str()
+    {
+        return "collectionTimeScope";
+    }
+};
+
+struct CollectionDuration
+{
+    static std::string str()
+    {
+        return "collectionDuration";
+    }
+};
+
 } // namespace tstring
 } // namespace utils