{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0cef308196152fcdfc40ef9a16f041621e3ff59127e85fc2b8a4dc536f4bfa15",
    "signature": "0x68fa604da7a0ea43b310f35886243419cb70abb7fc4ee0d736b31535341561155904f1b3d8b901b776e863e33838aacbf9144433d54591f17a7050b8c9f511fa1c",
    "signer": "0x4fA1a6fC8859240f25d5735DCF911eb46E235e89",
    "userId": "470598044"
  }
}