{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x212b4275b35f53241786d91f96aa2818ab7d1fc5a59882cf43fd181692569547",
    "signature": "0xe46ce1ccf3b9c6e4479d93464eb590f81ef506c35103fe5e0387c0fc60ffa54f218006b591fc10b822f2fe8f5cf48d28df903ad1e268bc2ab062fe13054b94451b",
    "signer": "0x2d45Ff20F38e74b7Fd736aCa88aEe5E051E7d242",
    "userId": "563507633"
  }
}