{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1a090fd22dbc6dc52517de5cdb3578f3f55931f091b09fccbcee993d2c5263bd",
    "signature": "0xbdb2fbeb339759c6c20d7d5e86bfb66a784493d6dd2bbfb114e3ec2ac09f46474ea0da6cf1d07e1222351b5f594b053847728042f3e1964029773ff23f2841441b",
    "signer": "0x9562F5895A87678af3d64CB15bf38c3517BF661e",
    "userId": "632312864"
  }
}