{
  "manageEntity": {
    "action": "Save",
    "entityId": "921175382",
    "entityType": "Track",
    "nonce": "0xcb9526ff7e47963d95cecd9a559050f493ddf7ce07c0db74876c04ffc55ba97e",
    "signature": "0xd01203b6565c41a58f4a0985b7f2433d4bf02ebf09356d897debf51aeff39b9b4d5de0b79e23efe1e9f2201a26e4c6930f1edd194ab856dc38211adfd8ee183a1b",
    "signer": "0xa22176a11BF6703EFe39D488aA7cC06aa781C44A",
    "userId": "633924738"
  }
}