{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9bebb95d5f79dc8cb1eccadff6a80ea288c7611ab755dc387f2098c56871e18d",
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    "signer": "0x53A4E185DAc7588016d96A25812E58A956DeBA9C",
    "userId": "757411767"
  }
}