{
  "manageEntity": {
    "action": "Save",
    "entityId": "1632938500",
    "entityType": "Track",
    "nonce": "0x57b2100cb99b892609a23f0360412fc2376cca4107a386d52c53e2de13fe9e98",
    "signature": "0x6a5f084f63d858866721a64e46f0202bc3d5c343c9d57ee2839480e00577724c75f4dedd8c02ff76b16c64563fc0926b8a8497f6aa214434add63258b102438a1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}