diff --git a/fbpcs/common/entity/stage_state_instance.py b/fbpcs/common/entity/stage_state_instance.py
new file mode 100644
index 000000000..1cff00459
--- /dev/null
+++ b/fbpcs/common/entity/stage_state_instance.py
@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+# pyre-strict
+
+import time
+from dataclasses import field, dataclass
+from enum import Enum
+from typing import Optional, List
+
+from fbpcp.entity.container_instance import ContainerInstance
+from fbpcp.util.typing import checked_cast
+from fbpcs.common.entity.instance_base import InstanceBase
+
+
+class StageStateInstanceStatus(Enum):
+    UNKNOWN = "UNKNOWN"
+    CREATED = "CREATED"
+    STARTED = "STARTED"
+    COMPLETED = "COMPLETED"
+    FAILED = "FAILED"
+
+
+@dataclass
+class StageStateInstance(InstanceBase):
+    instance_id: str
+    stage_name: str
+    status: StageStateInstanceStatus = StageStateInstanceStatus.CREATED
+    containers: List[ContainerInstance] = field(default_factory=list)
+    start_time: int = field(default_factory=lambda: int(time.time()))
+    end_time: Optional[int] = None
+
+    @property
+    def server_ips(self) -> List[str]:
+        return [
+            checked_cast(str, container.ip_address) for container in self.containers
+        ]
+
+    @property
+    def elapsed_time(self) -> int:
+        if self.end_time is None:
+            return int(time.time()) - self.start_time
+
+        return self.end_time - self.start_time
+
+    def get_instance_id(self) -> str:
+        return self.instance_id
diff --git a/fbpcs/common/tests/test_stage_state_instance.py b/fbpcs/common/tests/test_stage_state_instance.py
new file mode 100644
index 000000000..57a449518
--- /dev/null
+++ b/fbpcs/common/tests/test_stage_state_instance.py
@@ -0,0 +1,45 @@
+#!/usr/bin/env python3
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+import unittest
+
+from fbpcp.entity.container_instance import ContainerInstance, ContainerInstanceStatus
+from fbpcs.common.entity.stage_state_instance import (
+    StageStateInstance,
+    StageStateInstanceStatus,
+)
+
+
+class TestStageStateInstance(unittest.TestCase):
+    def setUp(self):
+        self.stage_state_instance = StageStateInstance(
+            instance_id="stage_state_instance",
+            stage_name="test_stage",
+            status=StageStateInstanceStatus.COMPLETED,
+            containers=[
+                ContainerInstance(
+                    instance_id="test_container_instance_1",
+                    ip_address="192.0.2.4",
+                    status=ContainerInstanceStatus.COMPLETED,
+                ),
+                ContainerInstance(
+                    instance_id="test_container_instance_2",
+                    ip_address="192.0.2.5",
+                    status=ContainerInstanceStatus.COMPLETED,
+                ),
+            ],
+            start_time=1646642432,
+            end_time=1646642432 + 5,
+        )
+
+    def test_server_ips(self) -> None:
+        self.assertEqual(len(self.stage_state_instance.containers), 2)
+        self.assertEqual(
+            self.stage_state_instance.server_ips, ["192.0.2.4", "192.0.2.5"]
+        )
+
+    def test_elapsed_time(self) -> None:
+        self.assertEqual(self.stage_state_instance.elapsed_time, 5)
diff --git a/fbpcs/private_computation/entity/private_computation_instance.py b/fbpcs/private_computation/entity/private_computation_instance.py
index a6567028d..ebb18e383 100644
--- a/fbpcs/private_computation/entity/private_computation_instance.py
+++ b/fbpcs/private_computation/entity/private_computation_instance.py
@@ -24,6 +24,10 @@
 from fbpcp.entity.mpc_instance import MPCInstanceStatus
 from fbpcs.common.entity.instance_base import InstanceBase
 from fbpcs.common.entity.pcs_mpc_instance import PCSMPCInstance
+from fbpcs.common.entity.stage_state_instance import (
+    StageStateInstance,
+    StageStateInstanceStatus,
+)
 from fbpcs.pid.entity.pid_instance import PIDInstance, PIDInstanceStatus
 from fbpcs.pid.entity.pid_stages import UnionPIDStage
 from fbpcs.pid.service.pid_service.pid_stage_mapper import STAGE_TO_FILE_FORMAT_MAP
@@ -70,9 +74,14 @@ class ResultVisibility(IntEnum):
     PARTNER = 2
 
 
-UnionedPCInstance = Union[PIDInstance, PCSMPCInstance, PostProcessingInstance]
+UnionedPCInstance = Union[
+    PIDInstance, PCSMPCInstance, PostProcessingInstance, StageStateInstance
+]
 UnionedPCInstanceStatus = Union[
-    PIDInstanceStatus, MPCInstanceStatus, PostProcessingInstanceStatus
+    PIDInstanceStatus,
+    MPCInstanceStatus,
+    PostProcessingInstanceStatus,
+    StageStateInstanceStatus,
 ]