{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x379f1467991b5834abcd005e1a468e01a6f79d8a147f1f7fb06982066f00b039",
    "signature": "0xb29ab159e214b57629a54e18cce1d2c1e87ca98e52a3acc4e587a097485746ff405c267bb401fe3280cecc1f2c85f9be0ea5841689d1b7b590bb03878d8673661b",
    "signer": "0x2babB7663AaA7b6D23568cA5812a4F24eff16068",
    "userId": "679637994"
  }
}