{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x080802f395d58d303f562de4f0ce4d21c7cb77458d63de6f9cc6c89dce4a337d",
    "signature": "0x7bea074a287a3091b01179d75a963d6e8b7beaf5b1eca5b3b07a19226fb46e2248481b39be480451e573315d0f6dfc2dcbbf5ac7bd983df25c0e68b4a45db8c71c",
    "signer": "0x37C570897bDdEbADcfa9029bc229E9B5ca683b1f",
    "userId": "679231275"
  }
}