diff --git a/binance/async_client.py b/binance/async_client.py
index 7bd8442aa..1cbc74bb1 100644
--- a/binance/async_client.py
+++ b/binance/async_client.py
@@ -128,10 +128,23 @@ async def _request(
                 uri = f"{uri}?{kwargs['params']}"
                 kwargs.pop("params")
 
+        data = kwargs.get("data")
+        if data is not None:
+            del kwargs["data"]
+
+        if signed and self.PRIVATE_KEY and data: # handle issues with signing using eddsa/rsa and POST requests
+            dict_data = Client.convert_to_dict(data)
+            signature = dict_data["signature"] if "signature" in dict_data else  None
+            if signature:
+                del dict_data["signature"]
+            url_encoded_data = urlencode(dict_data)
+            data = f"{url_encoded_data}&signature={signature}"
+
         async with getattr(self.session, method)(
             yarl.URL(uri, encoded=True),
             proxy=self.https_proxy,
             headers=headers,
+            data=data,
             **kwargs,
         ) as response:
             self.response = response
diff --git a/binance/base_client.py b/binance/base_client.py
index e36eff8a3..2b4ace83f 100644
--- a/binance/base_client.py
+++ b/binance/base_client.py
@@ -312,6 +312,11 @@ def _rsa_signature(self, query_string: str):
     def encode_uri_component(uri, safe="~()*!.'"):
         return _urlencode.quote(uri, safe=safe)
 
+    @staticmethod
+    def convert_to_dict(list_tuples):
+        dictionary = dict((key, value) for key, value in list_tuples)
+        return dictionary
+
     def _ed25519_signature(self, query_string: str):
         assert self.PRIVATE_KEY
         res = b64encode(
diff --git a/binance/client.py b/binance/client.py
index c8dd14f8b..388aa5957 100755
--- a/binance/client.py
+++ b/binance/client.py
@@ -71,7 +71,19 @@ def _request(
 
         kwargs = self._get_request_kwargs(method, signed, force_params, **kwargs)
 
-        self.response = getattr(self.session, method)(uri, headers=headers, **kwargs)
+        data = kwargs.get("data")
+        if data is not None:
+            del kwargs["data"]
+
+        if signed and self.PRIVATE_KEY and data: # handle issues with signing using eddsa/rsa and POST requests
+            dict_data = Client.convert_to_dict(data)
+            signature = dict_data["signature"] if "signature" in dict_data else  None
+            if signature:
+                del dict_data["signature"]
+            url_encoded_data = urlencode(dict_data)
+            data = f"{url_encoded_data}&signature={signature}"
+
+        self.response = getattr(self.session, method)(uri, headers=headers, data=data, **kwargs)
         return self._handle_response(self.response)
 
     @staticmethod