{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8aaac5f429cdeeb2048bece668bab90dcddf594e9f053a8373b2614bf09e6361",
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    "signer": "0x1cBD5D683221775A4DEAdBDF6D31123B76c14993",
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  }
}