{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfc0bbfd2f954198cbd20d433944b1746e1240aac3b3d95b925c630b820c750c5",
    "signature": "0x7fb62b706927ae66c596525f268855e6613947da4c6ab57336f1d5c528dd7a531ab358e34be1e41b6daf1ef557f458847c3660233fc711453cdc49d9cd91ac401b",
    "signer": "0x8e43fB50A1566F5659d08D01C166F68b14371ED5",
    "userId": "964637229"
  }
}