{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd8bb8148ddb3d924ba087789b18078e3d949df371b44fe3c2ccd656f0062e313",
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    "signer": "0x9CA3eED2A5a13144734d45a266bf6D4Cb2873344",
    "userId": "508961668"
  }
}