{
  "manageEntity": {
    "action": "Save",
    "entityId": "60609",
    "entityType": "Track",
    "nonce": "0xc98253686e3793f22558a69e6decaa0d43fea4de918e9c34cf418cb82d9cc320",
    "signature": "0x1bdf72d2efa2fc1a105614996ab01139602e68ab9fb37fdc8e482e53671f138813b8e664b8d8729450605dfe26243ac8f8dfec1187342d0ca53c7304c4bba93e1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}