{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb03494fe777d71bd1ea11493470cf71470cc9078ad5902bc9a3bac29d10bc41f",
    "signature": "0xa7113482b11ac2aaf4d96b8dc0144a8dcebc221d2ccb4ad62bfd054e18df5e7006e866ea01b7627bf0b596df302dcbb6f8d8fa3b9cfa359b552f9117f690fde41c",
    "signer": "0xaddfe8a42a112B9e07190590DCa78C32CB396871",
    "userId": "380767039"
  }
}