{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x16e18aa1fd45d1ca17fd58eecb9b375a16d2fcd7025616a2c22f012a3ca96577",
    "signature": "0xe52f823bda4dc3e6eb5592718b1b819f1c70b38ab8e3e5452103b51a126368f82eea71d174aa965af1f2d8fe16ccbaabaf454d00d0d8291ed1844d353b3469f01b",
    "signer": "0xC07bCa19c00692a7AddDb26a6795D9A7F8bd4715",
    "userId": "48052618"
  }
}