diff --git a/ReactAndroid/src/main/jni/react/Bridge.cpp b/ReactAndroid/src/main/jni/react/Bridge.cpp
index 6654e8bd4..83f0aaa6b 100644
--- a/ReactAndroid/src/main/jni/react/Bridge.cpp
+++ b/ReactAndroid/src/main/jni/react/Bridge.cpp
@@ -47,8 +47,8 @@ void Bridge::loadApplicationUnbundle(
 
 void Bridge::callFunction(
     ExecutorToken executorToken,
-    const double moduleId,
-    const double methodId,
+    const std::string& moduleId,
+    const std::string& methodId,
     const folly::dynamic& arguments,
     const std::string& tracingName) {
   if (*m_destroyed) {
@@ -174,7 +174,7 @@ void Bridge::callNativeModules(JSExecutor& executor, const std::string& callJSON
   if (*m_destroyed) {
     return;
   }
-  m_callback->onCallNativeModules(getTokenForExecutor(executor), parseMethodCalls(callJSON), isEndOfBatch);
+  m_callback->onCallNativeModules(getTokenForExecutor(executor), callJSON, isEndOfBatch);
 }
 
 ExecutorToken Bridge::getMainExecutorToken() const {
diff --git a/ReactAndroid/src/main/jni/react/Bridge.h b/ReactAndroid/src/main/jni/react/Bridge.h
index 3618ef04f..b8abccdfd 100644
--- a/ReactAndroid/src/main/jni/react/Bridge.h
+++ b/ReactAndroid/src/main/jni/react/Bridge.h
@@ -30,7 +30,7 @@ public:
 
   virtual void onCallNativeModules(
       ExecutorToken executorToken,
-      std::vector<MethodCall>&& calls,
+      const std::string& callJSON,
       bool isEndOfBatch) = 0;
 
   virtual void onExecutorUnregistered(ExecutorToken executorToken) = 0;
@@ -66,8 +66,8 @@ public:
    */
   void callFunction(
     ExecutorToken executorToken,
-    const double moduleId,
-    const double methodId,
+    const std::string& moduleId,
+    const std::string& methodId,
     const folly::dynamic& args,
     const std::string& tracingName);
 
diff --git a/ReactAndroid/src/main/jni/react/Executor.h b/ReactAndroid/src/main/jni/react/Executor.h
index 6f392a3cd..07aea900a 100644
--- a/ReactAndroid/src/main/jni/react/Executor.h
+++ b/ReactAndroid/src/main/jni/react/Executor.h
@@ -47,7 +47,7 @@ public:
    * method ID and optional additional arguments in JS. The executor is responsible
    * for using Bridge->callNativeModules to invoke any necessary native modules methods.
    */
-  virtual void callFunction(const double moduleId, const double methodId, const folly::dynamic& arguments) = 0;
+  virtual void callFunction(const std::string& moduleId, const std::string& methodId, const folly::dynamic& arguments) = 0;
 
   /**
    * Executes BatchedBridge.invokeCallbackAndReturnFlushedQueue with the cbID,
diff --git a/ReactAndroid/src/main/jni/react/JSCExecutor.cpp b/ReactAndroid/src/main/jni/react/JSCExecutor.cpp
index feb9c63f9..a97a9ae6f 100644
--- a/ReactAndroid/src/main/jni/react/JSCExecutor.cpp
+++ b/ReactAndroid/src/main/jni/react/JSCExecutor.cpp
@@ -244,11 +244,11 @@ void JSCExecutor::flush() {
   m_bridge->callNativeModules(*this, calls, true);
 }
 
-void JSCExecutor::callFunction(const double moduleId, const double methodId, const folly::dynamic& arguments) {
+void JSCExecutor::callFunction(const std::string& moduleId, const std::string& methodId, const folly::dynamic& arguments) {
   // TODO:  Make this a first class function instead of evaling. #9317773
   std::vector<folly::dynamic> call{
-    (double) moduleId,
-    (double) methodId,
+    moduleId,
+    methodId,
     std::move(arguments),
   };
   std::string calls = executeJSCallWithJSC(m_context, "callFunctionReturnFlushedQueue", std::move(call));
diff --git a/ReactAndroid/src/main/jni/react/JSCExecutor.h b/ReactAndroid/src/main/jni/react/JSCExecutor.h
index 7f41170c8..7c704d077 100644
--- a/ReactAndroid/src/main/jni/react/JSCExecutor.h
+++ b/ReactAndroid/src/main/jni/react/JSCExecutor.h
@@ -58,8 +58,8 @@ public:
     const std::string& startupCode,
     const std::string& sourceURL) override;
   virtual void callFunction(
-    const double moduleId,
-    const double methodId,
+    const std::string& moduleId,
+    const std::string& methodId,
     const folly::dynamic& arguments) override;
   virtual void invokeCallback(
     const double callbackId,
diff --git a/ReactAndroid/src/main/jni/react/jni/OnLoad.cpp b/ReactAndroid/src/main/jni/react/jni/OnLoad.cpp
index 2ba655531..4c0722307 100644
--- a/ReactAndroid/src/main/jni/react/jni/OnLoad.cpp
+++ b/ReactAndroid/src/main/jni/react/jni/OnLoad.cpp
@@ -16,6 +16,7 @@
 #include <react/Executor.h>
 #include <react/JSCExecutor.h>
 #include <react/JSModulesUnbundle.h>
+#include <react/MethodCall.h>
 #include <react/Platform.h>
 #include "JExecutorToken.h"
 #include "JExecutorTokenFactory.h"
@@ -648,11 +649,11 @@ public:
 
   virtual void onCallNativeModules(
       ExecutorToken executorToken,
-      std::vector<MethodCall>&& calls,
+      const std::string& callJSON,
       bool isEndOfBatch) override {
-    executeCallbackOnCallbackQueueThread([executorToken, calls, isEndOfBatch] (ResolvedWeakReference& callback) {
+    executeCallbackOnCallbackQueueThread([executorToken, callJSON, isEndOfBatch] (ResolvedWeakReference& callback) {
       JNIEnv* env = Environment::current();
-      for (auto& call : calls) {
+      for (auto& call : react::parseMethodCalls(callJSON)) {
         makeJavaCall(env, executorToken, callback, call);
         if (env->ExceptionCheck()) {
           return;
@@ -780,8 +781,8 @@ static void callFunction(JNIEnv* env, jobject obj, JExecutorToken::jhybridobject
   try {
     bridge->callFunction(
       cthis(wrap_alias(jExecutorToken))->getExecutorToken(wrap_alias(jExecutorToken)),
-      (double) moduleId,
-      (double) methodId,
+      folly::to<std::string>(moduleId),
+      folly::to<std::string>(methodId),
       std::move(arguments->array),
       fromJString(env, tracingName)
     );
diff --git a/ReactAndroid/src/main/jni/react/jni/ProxyExecutor.cpp b/ReactAndroid/src/main/jni/react/jni/ProxyExecutor.cpp
index 07743bed8..4ad7a8eb0 100644
--- a/ReactAndroid/src/main/jni/react/jni/ProxyExecutor.cpp
+++ b/ReactAndroid/src/main/jni/react/jni/ProxyExecutor.cpp
@@ -58,10 +58,10 @@ void ProxyExecutor::loadApplicationUnbundle(std::unique_ptr<JSModulesUnbundle>,
     "Loading application unbundles is not supported for proxy executors");
 }
 
-void ProxyExecutor::callFunction(const double moduleId, const double methodId, const folly::dynamic& arguments) {
+void ProxyExecutor::callFunction(const std::string& moduleId, const std::string& methodId, const folly::dynamic& arguments) {
   std::vector<folly::dynamic> call{
-    (double) moduleId,
-    (double) methodId,
+    moduleId,
+    methodId,
     std::move(arguments),
   };
   std::string result = executeJSCallWithProxy(m_executor.get(), "callFunctionReturnFlushedQueue", std::move(call));
diff --git a/ReactAndroid/src/main/jni/react/jni/ProxyExecutor.h b/ReactAndroid/src/main/jni/react/jni/ProxyExecutor.h
index c66346424..c06ee9287 100644
--- a/ReactAndroid/src/main/jni/react/jni/ProxyExecutor.h
+++ b/ReactAndroid/src/main/jni/react/jni/ProxyExecutor.h
@@ -39,8 +39,8 @@ public:
     const std::string& startupCode,
     const std::string& sourceURL) override;
   virtual void callFunction(
-    const double moduleId,
-    const double methodId,
+    const std::string& moduleId,
+    const std::string& methodId,
     const folly::dynamic& arguments) override;
   virtual void invokeCallback(
     const double callbackId,