{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd22a01d2fdcbe6b24574f745b874692a77ac824cf1d4c9128b98644d0058932c",
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    "signer": "0x14692DD18b4510C50508926E344E5542451bf0B3",
    "userId": "633625709"
  }
}