{
  "manageEntity": {
    "action": "Save",
    "entityId": "472624103",
    "entityType": "Track",
    "nonce": "0x8b69e87d463c6dc38619594bd19db4b8035bd38282960f1665f70f355139fa63",
    "signature": "0x71da1587b171b043da0d5b5295d171893e61b78aefe123b68c400ba02615733c0f5954e73ea1957898f2465264d4aa9f443ea9f46c9bda5a8f99ff666ad72cd81c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}