{
  "manageEntity": {
    "action": "Save",
    "entityId": "1608280664",
    "entityType": "Track",
    "nonce": "0xd6e0226279c6c561d12b82c809fc048028e14f0d73730eb11c3a248d4d1a4d30",
    "signature": "0xcc3b5ef1cd6413454c55aca7d84170d28c8822628dd371fad014ee762f64f0fd5b7cdcb990f36b8da3beebff6248f47822f2e704132b57c4cc3fdff77c797d041c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}