{
  "manageEntity": {
    "action": "Save",
    "entityId": "1129571",
    "entityType": "Track",
    "nonce": "0xf6f3c7bb6fd5cbc347f50047d3fc25a5c7709bc8b69a67723d1af161e398ee9c",
    "signature": "0x265c53356fe3158177e18c2b16fbe8201264018f194374816da4dbf8e5eda8b961f0856f45ef3810f65727c46abf07545cc7e8bb67f14dc0aa4ac297ae0cbc031c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}