{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdcf812a28270dfee279f0ae3cd5fe1ac4bd89ec556c63be58bfa9981e693348d",
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    "signer": "0xa48DB3b4393F96ddcF404C400e8e0336767845c2",
    "userId": "360423327"
  }
}