diff --git a/chain_service/database/models/chain.py b/chain_service/database/models/chain.py
new file mode 100644
index 0000000..b0daf97
--- /dev/null
+++ b/chain_service/database/models/chain.py
@@ -0,0 +1,29 @@
+from .base import BaseMongoModel
+
+from datetime import datetime
+from pydantic import BaseModel, Field
+from typing import Literal, Union, Annotated, Optional, List
+
+
+class WaitAction(BaseModel):
+    action_type: Literal["wait"]
+    wait_for: int
+
+
+class TextCommentAction(BaseModel):
+    action_type: Literal["text_comment"]
+    text: str
+
+
+Action = Annotated[
+    Union[WaitAction, TextCommentAction], Field(description="action_type")
+]
+
+
+class Chain(BaseMongoModel):
+    name: Annotated[Optional[str], Field(default=None)]
+    actions: Annotated[Optional[List[Action]], Field(default=[])]
+    created_at: Annotated[datetime, Field(default_factory=datetime.utcnow)]
+
+    class Config(BaseMongoModel.Config):
+        pass