diff --git a/linode_api4/objects/base.py b/linode_api4/objects/base.py
index 26859087..be72a395 100644
--- a/linode_api4/objects/base.py
+++ b/linode_api4/objects/base.py
@@ -210,9 +210,26 @@ def save(self, force=True) -> bool:
         if not force and not self._changed:
             return False
 
-        resp = self._client.put(
-            type(self).api_endpoint, model=self, data=self._serialize()
-        )
+        data = None
+        if not self._populated:
+            data = {
+                a: object.__getattribute__(self, a)
+                for a in type(self).properties
+                if type(self).properties[a].mutable
+                and object.__getattribute__(self, a) is not None
+            }
+
+            for key, value in data.items():
+                if (
+                    isinstance(value, ExplicitNullValue)
+                    or value == ExplicitNullValue
+                ):
+                    data[key] = None
+
+        else:
+            data = self._serialize()
+
+        resp = self._client.put(type(self).api_endpoint, model=self, data=data)
 
         if "error" in resp:
             return False