{
  "manageEntity": {
    "action": "Save",
    "entityId": "1356336966",
    "entityType": "Track",
    "nonce": "0xdc2b364bb108747b52ebc405ad30ef61b8f1fafdf760b220df887695851d5f4e",
    "signature": "0x64bb85410425970bb95df800c8ea793c895f5ed3e6f0eee702ae1c48da672fd33de01dc79848266bf71fba7bbf6c11a41bb6af870f5bfe9326f431bf4212cac91c",
    "signer": "0x0E71C12c426F5C9206F778713f48B60477CA943b",
    "userId": "29088079"
  }
}