{
  "manageEntity": {
    "action": "Save",
    "entityId": "496242803",
    "entityType": "Track",
    "nonce": "0xb0c053c7fb5937f7ba32dd3bf46ec93e48e608bce2b515981829fd2d30a92f36",
    "signature": "0x2aa9a2e97ca12f205f66076b735b9139faaff8a314dae4e74bf18970439a231c324f0223b0c0057d0b66cdf37a2f90f005fccf9fee308a9a674fec863e8dea061c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}