{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x11dbfb2c76dc1b02e18dfdd9a83efaec7f3efaf1b0c1eb10d2c522aaab9b5a6c",
    "signature": "0xcd54ef7a21235c9cca5d1654db2b388aedc08607cb017bd1d7925d692e31294d7f6980b3fd1215471b94a6dbaff2356298ef04f5e9a2b5dfe32b53c3137d5c7a1c",
    "signer": "0x854c4A8686DBF9495A2D65244b72C4A0c30628d9",
    "userId": "920432305"
  }
}