{
  "manageEntity": {
    "action": "Save",
    "entityId": "1581059634",
    "entityType": "Track",
    "nonce": "0x30fba053e6793492fc8058514f76b3e0c029b1a561eddef7c02788897f3455f2",
    "signature": "0x7bbe97051f843e6f66f4b00d8330e3336823c591f16baacb44af32d210bee7227833a69025c78d42b4beddeb5583104f69f79aaa26f328127b4ccdc8e4cf84801c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}