{
  "manageEntity": {
    "action": "Save",
    "entityId": "33902410",
    "entityType": "Track",
    "nonce": "0x4535c27339a4a89c626f8a6b7464577fefdafc2e3b922a6172a22bfec465f3b5",
    "signature": "0xcbdf6072408ee596c51e03ad5104fb9a4a80fdd7f73770ac238325cb52febea05f7a508447fd2df949c618a683954d78bbdbe0204b98668a42fb06b8f97438d01b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}