{
  "manageEntity": {
    "action": "Save",
    "entityId": "280120319",
    "entityType": "Track",
    "nonce": "0x9af868a89e21384089af06c08389910e7a8cf0b363429296f40cb48b516dbc08",
    "signature": "0x914ab340d16e3bff089b6a2f8ebc24f3bb2924c8c357ed56caade60ef19f7ea543acc39dfd9c0e3492cd216152613a7cfa444478543cd5209760928a4d766b6b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}