{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0a6c70516d8baa919731194cb54e1abef0200d0c3cd713520c9aa357a44d3d1f",
    "signature": "0x6de2ef7e82179e8aadb4c722d1f6930c37d52ccac198705869ca8ace84df3429158af8fc4bd456e7ea7196e95928b296fd636a4982004ea4537a5efbbec7ce031c",
    "signer": "0x89d8eB915223b0368c688C2a51Ee2f5b1CdfC911",
    "userId": "101819865"
  }
}