{
  "manageEntity": {
    "action": "Save",
    "entityId": "847559539",
    "entityType": "Track",
    "nonce": "0xc23fceb893b7746a079ffb082b69bae20d5178d93069d95ff4ce737f7dab71f6",
    "signature": "0x86928a3957f4887a4d1584def78506cc442ccbe3a667b982d72e7125f143f1d02a41e6466489ab828f067ccc1e4cea0d2836591510b5cc12272beb1f491783b81b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}