{
  "manageEntity": {
    "action": "Save",
    "entityId": "509868034",
    "entityType": "Track",
    "nonce": "0xf11c2f8f55a7d27892d717417d4641b49c52c8d0a350407a5860c4333234abf1",
    "signature": "0x9dee40aa7783f1de8fa34647b09a15ff989197ebc71538e6bfa1f066fee9c4f87d443348eacc92493a94d9a2b4873a9e73b95d87cdf68f60e2eef54b3d57b1961b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}