{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc54331033bc731faf0da177ee96698741b9f2eb94c87544295c69f983fcdbf9e",
    "signature": "0x9f8679d2f8a8625667b160d1f0fddff7d4133684f7eaa4331374d0b53e7fe378355bba241cb456c25c7a5e5a4f034626f8cd33b5cc2e003cd12349101ac755f21b",
    "signer": "0x6867D51E60764cD265E7aF8e4Abc08B63b75826a",
    "userId": "241870892"
  }
}