{
  "manageEntity": {
    "action": "Save",
    "entityId": "998960",
    "entityType": "Track",
    "nonce": "0xa7fa1463b160022ef9ece0fb92060f906b7d3df702d34653ca5c5af006e85944",
    "signature": "0x8e3a08f2a0565abed609555b13380128822da986fc21e9d5fd86a74d4ab711140a9a509665e908d66a5f4a3d5f23b54a48f0010b3bfb4e641a6c5dabec7d9f0c1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}