{
  "manageEntity": {
    "action": "Save",
    "entityId": "416946659",
    "entityType": "Track",
    "nonce": "0x92747eae18d877d41dcdcee68be80af90fb1f4a5539555fdf0ec1b179df9d3de",
    "signature": "0x277758fab256c7e548e28d60325696f96a61366791ace146fc2c69236df8632c1eab790338e23f3f006649eb92d88bfb438c7d4124613568b87f2617f263cb1c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}