diff --git a/fbpcp/entity/attestation_document.py b/fbpcp/entity/attestation_document.py
new file mode 100644
index 00000000..168bda90
--- /dev/null
+++ b/fbpcp/entity/attestation_document.py
@@ -0,0 +1,38 @@
+#!/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
+from dataclasses import dataclass
+from enum import Enum
+from typing import List, Optional
+
+from dataclasses_json import dataclass_json
+from fbpcp.entity.measurement import Measurement
+
+
+class PolicyName(str, Enum):
+    BINARY_MATCH = "BINARY_MATCH"
+
+
+@dataclass_json
+@dataclass
+class PolicyParams:
+    package_name: Optional[str]
+    version: Optional[str]
+
+
+@dataclass_json
+@dataclass
+class AttestationPolicy:
+    policy_name: PolicyName
+    params: PolicyParams
+
+
+@dataclass_json
+@dataclass
+class AttestationDocument:
+    policy: AttestationPolicy
+    measurements: List[Measurement]
diff --git a/fbpcp/entity/measurement.py b/fbpcp/entity/measurement.py
new file mode 100644
index 00000000..1dbf42f1
--- /dev/null
+++ b/fbpcp/entity/measurement.py
@@ -0,0 +1,17 @@
+#!/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
+from dataclasses import dataclass
+
+from dataclasses_json import dataclass_json
+
+
+@dataclass_json
+@dataclass
+class Measurement:
+    key: str
+    value: str