{
  "manageEntity": {
    "action": "Save",
    "entityId": "206640",
    "entityType": "Track",
    "nonce": "0xaf622b0d41d1161074f60756c199df359455360a46589c1db436172b141a257b",
    "signature": "0xa369ff2c0bb597aa7e9daeacf1310c18350871a9af93e8fcde936fd3217f86bf0072adb2e178545307b24c243ac2d8782d59b75960ea2a9e9311f81e87581d3c1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}