{
  "manageEntity": {
    "action": "Save",
    "entityId": "684991",
    "entityType": "Track",
    "nonce": "0x456c79d1fe7115b01f3058485b9a1df238204835528fa4c5497b769630eef0a0",
    "signature": "0x89c536481cefb0289c0a607ace7ff0b2c6c6e4049671e439e51060d1e092ea245e173a894bfc0de35392a831c42baf7806a9189180dce99c5bc6f5c090cd64851c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}