{
  "manageEntity": {
    "action": "Save",
    "entityId": "406150",
    "entityType": "Track",
    "nonce": "0xb2ce16fd51e684d7babb857a7f4b927f5ac8da45a5b6a80de792d51277238808",
    "signature": "0xc3bd40dfb060492e8ff377b430e4bcf29ead682ecf04998f80910ed63550387a6ba0e91b3885cd722795e2fe2023a524bb4342174671db82a22f48f5066819c21b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}