{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3718b4bbd31cecb3e4e3414a5a4c65cf081b558c7c26011e478e4a13c202cbbc",
    "signature": "0x47948789f4199fc78bede2ccaf5d33eb3b4ba96d258b7bfcbbb2075668c9f8fa416004bf8e399e12d80323b81c7a887b99b762cda00ebb343821ecf05f46605f1c",
    "signer": "0x7f3279A535cc14232855318E897d9a7bE8Cb08B1",
    "userId": "992985584"
  }
}