{
  "manageEntity": {
    "action": "Save",
    "entityId": "1016953460",
    "entityType": "Track",
    "nonce": "0x380032ff92b98751f3e9b12cb7bc02067ab707db733a7857a442fcce9a06d989",
    "signature": "0x3229b025fddeb02da63debeec22cd7141b7238a653416415a24d4cba2c546f1e08ae425dd3a77f8a13bd27d9d03c6b52463a535f04ae39a5f689f175418434661c",
    "signer": "0x67479063A246B10560F7FfC48Dba47268867417B",
    "userId": "745004514"
  }
}