{
  "manageEntity": {
    "action": "Save",
    "entityId": "1159902967",
    "entityType": "Track",
    "nonce": "0x5d83bed51ad81249d71b584ce92433f9cfb64030d3fa67878c286c1ae2b08999",
    "signature": "0xe98f1ffb647e4ed883fecc06b2d39ca71611e9eeea809d5b40d20b3ae0992d383cbfd0c56c9a2930dcdf39dcff52afec6633daffb8c5ec944069dd4639b226ee1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}