{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121242",
    "entityType": "Track",
    "nonce": "0x822de2311ce74ff0ca7988d178ad5399516f84f0acaca5adef3db04be0ca4323",
    "signature": "0x89eb6f081346aca1abc6b2116ac51e9ec900bc493b9e5cbac98d893527f744655e63dc42df53dd7680b84a9b9d70e93cea3f5e56722766280de0ece55caeb6df1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}