{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd2feb99abbe831b9c2cf7d1cd73e9c3bc345ad1f6bd0635a563afa3ae49530c8",
    "signature": "0x229dcc381c71b9a18aa04fcef3c327b7b8761ab2eceda23eae9cd73223d0cc426ac3d32ca1e0ab998cc95d4b6fbb7e45eeaa8ff5bf88b9ceade3a0407c8920721b",
    "signer": "0xbF01d3816a6F4764Da6dF0CeFC8C48EEFdABB333",
    "userId": "419795889"
  }
}