{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5c118a62dc1655f4724d4a01bb058d31186c672d8a41cddc1d3018b978a84cf9",
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    "signer": "0xfF3856c76E772eb9901df1edE6E84DC7e2C4Cd20",
    "userId": "950085558"
  }
}