{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Action": [
            "lambda:InvokeFunction",
            "polly:SynthesizeSpeech"
            ],
        "Effect": "Allow",
        "Resource": "*"
        }
     ]
}

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "Service": "lex.amazonaws.com"
      },
      "Action": "sts:AssumeRole"
    }
  ]
}