{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x00393402da08b556b92c7cc62f51df7cccd3f3952fdeb9b9996160cb0eb8f7ac",
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    "signer": "0x6bE1750982C097e426E546542683fb42BD1698F1",
    "userId": "863774823"
  }
}