{
  "manageEntity": {
    "action": "Save",
    "entityId": "368341",
    "entityType": "Track",
    "nonce": "0x63dedc8e2e43803d607e468e927168dd2684170389616ab57e7aadb298bbfedd",
    "signature": "0xff4b9053b01ac9026dbaceeb8bf941cc9a004f5c02e7586a06aac98308427d2134fcde9f64a3e7af412590147a072b30ee6f573fe2f187726c81134cbf0c6bd61b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}