{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4a1b4823ec416c542c1444e62ce99117516754ee9470f0da6d89c265a112b478",
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    "signer": "0xCDad39c211C3eB59f1cE1874416292966f4752e1",
    "userId": "643398821"
  }
}