{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x468e9a78b9fde636786526c33203a646f9573393b90cc744acdcd73677c4f867",
    "signature": "0x5699823db75d098e77082999d4b3762c68e7a021bdd6f479a3634becea92ad8d35890fc558a6bf9938716d1e1c8e143235f9bfe8a217ab9537eeb6e030284e311b",
    "signer": "0xB829d797974E34CA4ABCd67CB5AFd0Eb84543A2d",
    "userId": "862165007"
  }
}