{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x512aa56bd8b94a8b95a96f52905dd417988fe93750ae0d2ba45bcb030c3f609d",
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    "signer": "0xE5DbE6Dad42e6bdCa67eCD952F5d0a1d69fFCef5",
    "userId": "88788"
  }
}