{
  "manageEntity": {
    "action": "Save",
    "entityId": "405588",
    "entityType": "Track",
    "nonce": "0x185154147295945fe4cd9faa7624ab5706552dd361eca9693a985b10dba588b5",
    "signature": "0x0023baf911f065fa9b6fe5cf8e7efef7b4a7447ebd04c06f906b97e49db34e7277e847a692bee0894fc24727a6ccb6ff1d4174df068526f6f3e99e9c30224e781b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}