{
  "manageEntity": {
    "action": "Save",
    "entityId": "1632428583",
    "entityType": "Track",
    "nonce": "0xf4bddb36b488088a9a1bd19d371b40a50d8fb2f3833b59328eba4611d6290ff6",
    "signature": "0x953508d146e445628bd0026f31320f3b7c8556cd8c14be07dbf122bb41d9be921b50b662fb0865a27b8948240da572d6fe9bb46e6ea9a5b9411cabb19f1b33d71b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}