{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xeabe6f6140d44e3fdbc3750da3585b68267886478ab4800b230efa2c7c04ec93",
    "signature": "0xacd30c1b059dd2fef87984512ed08ee2597abf72988b4d9e14562e747320e2f031411cbcc799eb4affeb2a913f4bd2dd576d16cae04fe338efbbb961cc0d41ca1b",
    "signer": "0x829544e8682E5cdE9C6846B7497a279161A0C103",
    "userId": "140734835"
  }
}