{
  "manageEntity": {
    "action": "Save",
    "entityId": "803276679",
    "entityType": "Track",
    "nonce": "0x28b5865b386986b2abd22e83ce4b34e5a04564d97a620f5a74dab5ceedb56cd7",
    "signature": "0xb7e96c852bca05b3ebdbf4a7844c7e5c3a68fdeb0547a4ad46a59215215563d955b0e2e348e7e2c9f355adc6f50c9bc71620f923a58c5d19c82b85d7c6dda2591b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}