{
  "manageEntity": {
    "action": "Save",
    "entityId": "1940862970",
    "entityType": "Track",
    "nonce": "0xa1b7ce43b083d6a589855daf4feb916ed637c589ccfb50cabe766bd5e5b6efae",
    "signature": "0x1d80e34f807e27597e42169e32749c5e954ed212f35df34dcfe7eedb8c6ee08f4b3fb1ffb2194644417781a42f1a3427dba2f45644c5c59294dab14791bc96e41b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}