{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0afba580e2e703b1ffa326e9eb0a4953272662d2278b80507e9635afad70fcb6",
    "signature": "0xeb0a2d8ff549aa04153e4d41210b5e8eaf9ca50c60663a7a5445a96867cccca42686d4b8fc5aa785488a5f0470b9e72701ba498f41201352353405befe8e5f091c",
    "signer": "0x63527e9BdaBC6E35850938B1d7C86d07B9E180dd",
    "userId": "890955176"
  }
}