{
  "Version": "2012-10-17",
  "Statement": {
    "Effect": "Deny",
    "Action": "dynamodb:PutItem",
    "Resource": "arn:aws:dynamodb:*:*:table/Thread",
    "Condition": {
      "ForAnyValue:StringEquals": {
        "dynamodb:Attributes": [
          "ID",
          "PostDateTime"
        ]
      }
    }
  }
}