{
  "manageEntity": {
    "action": "Save",
    "entityId": "1507731566",
    "entityType": "Track",
    "nonce": "0x09a6ad98f236acc765eaf07336acd0bb4f174c274420dbf6014f1df86128af67",
    "signature": "0x538f8224d43c36ec2f789a5965ee9911a6868695d250fccb0bd83cbd0adb5c9308809d65057f7cb798541233b76a13bd5a57d69a156aa0b0ed641dfada3a21d91c",
    "signer": "0x061A60900C738C67bcf3F9Cb7Fe8f703DbEc8Ee0",
    "userId": "718327235"
  }
}