{
  "manageEntity": {
    "action": "Save",
    "entityId": "234916976",
    "entityType": "Track",
    "nonce": "0x9895760b0a3b92fc153aeb59ec26782ef78b615f87416c6f710218167981af65",
    "signature": "0x0b8dea64c74645a5f60a5876575d10c6ac17b24b4f57e41b6fe97a3af668c0385e48a213deaec85d569ab1d099f7739d1c2907fd2ae638b0db8a2af09dd8e7821c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}