{
  "manageEntity": {
    "action": "Save",
    "entityId": "1285049895",
    "entityType": "Track",
    "nonce": "0x9c1623fc9267120423d90b9f91a955fe179c35bd2d161a691641ae10fe61e1af",
    "signature": "0xc00f33185e94efb32a4d22f7b0d420b1617a37f670a54500b4ce94a6ea8d404419ff9ad0da3c21e4cfda25244509f49821c1a09b33e579e73b3e151d6dfadf331c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}