{
  "manageEntity": {
    "action": "Save",
    "entityId": "1764220124",
    "entityType": "Track",
    "nonce": "0x8036900fc3344c9ef00e598ad9044003ce085c9333357eb9ce575d369f400fdf",
    "signature": "0x578c0160b32b265b1f7c93a3501c38c684990972380e6e3dd5758a36da96f12918fce47e97eee246bb5c22e1d9a9bf98a61ba183561d2573a5672ba821c111c81c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}