{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2df0fb26f860ec7001935e12d651a903779109f5057c8296d4731340aa6603fb",
    "signature": "0x9ab71a5e859c727b11c11239d6d2ae369d125b372654f3e56abe072603e1f8a47ac6bc014c27bcde81325d8cd5acf0a6eb69d07415877e94b3e6088173a00bc51b",
    "signer": "0xF6D38D672Ed02F5e11A69Eb532A8AC8d43D659Cf",
    "userId": "729172108"
  }
}