{
  "manageEntity": {
    "action": "Save",
    "entityId": "1041",
    "entityType": "Track",
    "nonce": "0xa75580ec0e24c6418a90215b1b3907f2bb9a67fc34c141829e17f121af748d50",
    "signature": "0xc16efff0383a0bf8fdfaefe12726e8f2ac585d29301326c29187e2986c88b26419dbdd04c67ed22142bbe7ed98c262be1a953e514d4bbdba6187d95e94bb78be1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}