{
  "manageEntity": {
    "action": "Save",
    "entityId": "651685452",
    "entityType": "Track",
    "nonce": "0xee5ff0ad75990914ade1de9ddafd91e7051bf3a79cd1c89a5674a545f14b4394",
    "signature": "0x0263ee35346e56200a09410776904dd3cebed4eabf0badbb914a07fba23d4f6c6eebb483b5c992c7cfe312eef5d7d8846345d0f10bd34f8e3584d9eeea2272841b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}