Downvote Entity

Endpoint

URL: /entities/:entityId/downvote

Method: PATCH

Authentication Required: Yes

Downvotes an entity on behalf of the authenticated user. If the user has previously upvoted the entity, the upvote is removed.

Parameter	Type	Required	Description
`entityId`	`string`	Yes	The ID of the entity.

Header	Type	Required	Description
`Authorization`	`string`	Yes	Bearer token for auth.

None

PATCH /entities/abc123/downvote
Authorization: Bearer <ACCESS_TOKEN>

{
  "id": "abc123",
  "userId": "user_001",
  "title": "Great Idea",
  "upvotes": [],
  "downvotes": ["user_001", "user_002"],
  ...
}

{
  "error": "Missing entityId in request.",
  "code": "entity/invalid-id"
}

{
  "error": "Entity not found.",
  "code": "entity/not-found"
}

{
  "error": "User already downvoted entity.",
  "code": "entity/already-downvoted"
}

{
  "error": "Internal server error.",
  "code": "entity/server-error",
  "details": "<Error message>"
}