{
  "manageEntity": {
    "action": "Save",
    "entityId": "1116831",
    "entityType": "Track",
    "nonce": "0x9b1bc65e1be91172a4102f38d023b82d7156c7ebf76740c441d4a83430db8590",
    "signature": "0x8712ad122010418466d494c16e4d425611091944dd971cb2e32fc797572eed66320b1c231c6d949df09f4ab189739c24e5b78ff9dcd7a1b67dc06dc8032fa3f51b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}