{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcd72ad0810903ba63063cffc1cf5b75bfffb11aaa988c5b5c3dbd5135a6d177a",
    "signature": "0xe102d1d0c5297e5e1350ef43f988084a366ec9fe0a7c9f83df0513ee5a3032ca55a3253a87b9fde01510ab8ec0cee6d88436a5310f7491d8641410bdd2deb37e1c",
    "signer": "0x34aA674491417d9aCC0Fc622796810A2e3908f8D",
    "userId": "665434834"
  }
}