{
  "manageEntity": {
    "action": "Save",
    "entityId": "1450727891",
    "entityType": "Track",
    "nonce": "0x080a1e9723da931bfc83bd6d10ce81cbde13939a1471b2ff9be0c87ca44a12ab",
    "signature": "0x2966ffa1b762eeec9ccdd65b7b28dd33f11ec2675c929510782ba233e953297023c6b4d9412e88822913397c98f2f9a00435606db4acad8878f9ee4e1eef7dfb1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}