{
  "manageEntity": {
    "action": "Save",
    "entityId": "22990787",
    "entityType": "Track",
    "nonce": "0xf4a03f92617b27649ef29d0d8803aab09ba8625b015ee13acba6c92231c1999d",
    "signature": "0x2b8a8e3bdc5a07fd2ba63323ce61ef4e582b6dd9fbdd88d156309e0164bf245c01612464ae164ad1b274aa7c1102ed989a95ac67dbd3c71eda1fc91ab0dd70ef1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}