{
  "manageEntity": {
    "action": "Save",
    "entityId": "1453801500",
    "entityType": "Track",
    "nonce": "0xe4050cd5e4b1ace53b5b5400e766d7692685802ec942917e8f99fb8650f55e1f",
    "signature": "0x21aef5535de09499be85dd93dbea9a455157ca66ce13bd7bf9e9413b188188bb54872acb688f5bf944b71c581ea00c8164102273f862446e6ff8c620c9ac46e11b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}