{
  "manageEntity": {
    "action": "Save",
    "entityId": "388942",
    "entityType": "Track",
    "nonce": "0x09c193fd80949b94a1abd32db5e4023edac509dafad7d2f4fa5c4a9948993d99",
    "signature": "0xcb804179ae77f89f912d02cc0196455f342cbc9532ffdba9ba7ac4e6b18766620dfe432c807d9f0af53de55f10fed192ff79c7691d6dc795e6054f5a4c74df031b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}