{
  "manageEntity": {
    "action": "Save",
    "entityId": "1465921506",
    "entityType": "Track",
    "nonce": "0xf1ba2eb6d743b4e8941143507a58807cb03622e0ba6bd84cc5889e5ca395c394",
    "signature": "0x4d141806eddab76c8fd63d8c3d308e8dd7773734b8e67837bfd3c54f7affddf854e048570f0a848d998cce875fcbc1f5e912249285b2115bc71aa9c8f54b9aff1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}