{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2c2a37ffe0765da56e62618e9aa57085b3462d352781509291be4101ff459204",
    "signature": "0xdcc4c0acddb48fc414864fc1bb6b7965e4e650869a8d8c1b5d6b731ed9b68dea3872627c0bb0cb4036c7d74535919139c831276ff0d11ccb7b2551db76c76bb01b",
    "signer": "0xe3c64b1f5E7e0Da588E291cF14186fA7EFa5f2E2",
    "userId": "995280810"
  }
}