{
  "manageEntity": {
    "action": "Save",
    "entityId": "379259389",
    "entityType": "Track",
    "nonce": "0x34def705c6ddd7bbd6b3c7c28224f13df8cf109d7b97fa2a3472b32cd6481b62",
    "signature": "0x14bf2f1f27bf8cb2d3428777439a3f1520df0c175953fda7d18fb7cfef9a2306395b1c3d1ad04d8fe991ad3a1a4fb779024ed860c775973dd5b4467fee88cc751c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}