{
  "manageEntity": {
    "action": "Save",
    "entityId": "690295",
    "entityType": "Track",
    "nonce": "0x5d36976bd02d8bd850d2807954a5a7b1299d6fbedeff37bbee1bcbb7c65bb46f",
    "signature": "0xe6fe52346ce8ab73fd7ce409e9fcc65683ba58a99c75a111cbac42702a4903661bf0a004d3044caacdad4c5b8ae1d9ed4226bc307d8a0a620e6c4e688f35185e1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}