{
  "manageEntity": {
    "action": "Save",
    "entityId": "147008792",
    "entityType": "Track",
    "nonce": "0x8ea4226544e2c0b6f1ac60c9651ad1b9fd8cee7ae5949086b0a743d397bfc114",
    "signature": "0xf43359c406db5be724d72cb14f1990686d045df806d5bbb4c5a4c2a521bfec7126d238a3e6649ce0d5278496a668433ab56bd8b05c1b05ebb4218352bf5d04b11c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}