{
  "manageEntity": {
    "action": "Save",
    "entityId": "1539477025",
    "entityType": "Track",
    "nonce": "0x3ed71cb4242ba8bab0b0e59f563dc2637ae6cb48adb7ab23393e011975a51883",
    "signature": "0xe9d79405d6d3ac5fd097cf23f0c4e878236610c76126cfd28a9291ec4fef92e00cc765d13540d765a943a50130e851e21be3bb62624e709f166351628ec0694d1b",
    "signer": "0x4086Dda2D91F77cd46De0859a4de37F888508faA",
    "userId": "568518925"
  }
}