{
  "manageEntity": {
    "action": "Save",
    "entityId": "609502280",
    "entityType": "Track",
    "nonce": "0x349a2800e64e94f327359456c43bf558a1a54a7a2d42e623dfbcdf6e1a4cfdea",
    "signature": "0xc11e5a5e8634c6d84ae674623484409b046255f432af88cc1982070635f2840f46199a81f92d9ff47db85b6fb41eeabe37c102a26e80b247630027bfd88b79b61b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}