{
  "manageEntity": {
    "action": "Save",
    "entityId": "1389901417",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf40598b276dc8d9ad91febc1331528a1e36a58bb8c563ff58bccdfb6991699e8",
    "signature": "0xff1ef82feba731b4b619bf68deef46b3250ec6db01ce32690fa36f0666c455047dbfef336bf19ca614a11dd7efc6cb5da0ae97cd4512e73bb337cca481b3c26d1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}