{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8136cfa7f070f69ca01b8546c72cd6a660e79f382394e6dae1f595176893553c",
    "signature": "0x56357951b92cb42fe9fbc962f1904c15f3f84d2ab25cbf70ac049258fdbdf0cb0e488478b7949c3561030857008b6d190aa550199ce3a39fea6c3bd93b3c57e31c",
    "signer": "0x40f93A625960bCa5B0ecF1C6D260270712F75807",
    "userId": "337413910"
  }
}