{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x201c25813ca0476e33dbd0b6f300e10ed29385601c71dfc9c7d193e65c9c98ee",
    "signature": "0x29d22f7aea536ad81d08eed8112cde02361161c9fd656c939170d9f4adb241d71603ef83472d050e90d3d09656afdd587a925be88200681c5ee482c025282aa61b",
    "signer": "0x8802A88b9EB6Af9dfa0553CcF32fd9a231Cb7b5B",
    "userId": "417951015"
  }
}