{
  "manageEntity": {
    "action": "Save",
    "entityId": "496268609",
    "entityType": "Track",
    "nonce": "0xb15efdf55edd5edbb3fe828a80cd2559b5baa2e0ba9899eab5d30659fea141dc",
    "signature": "0x99901b77bbf0a1e213a88ad2982f291d90bf02b30f0509b11bf8042328cf152263273c8b78b14fb4a9ddfb99e59e25704c202dc25b299e4900ff995d0c6b6d541c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}