{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf51fee8a5965b720f7351864fc4f002c23c24ed8d703281c08cacf783c14924c",
    "signature": "0x53060d2890ec0e44be831eef6062772684e81969ad5c29507c1f00cd9cfc329c0755fa445883074d31aae80ec9158c68c7257e4cd73fdfb70382f537f983e9861c",
    "signer": "0x3697B946ce94fE7fBE1577a62354ab6e98935767",
    "userId": "586499085"
  }
}