{
  "manageEntity": {
    "action": "Save",
    "entityId": "1687042792",
    "entityType": "Track",
    "nonce": "0x976dd9cab9ba199b923be86e09725b2a57aa47a52780a322081e09aba2921ff0",
    "signature": "0x092612bcbcacc9320924bfb2bc3aa7e9d47f16b2c02e5d580611cd76d9b6b1134cb177947a6e35643b2f564c49aa2be89f080f1375d30dacf2fe2c2524c4ed741b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}