{
  "manageEntity": {
    "action": "Save",
    "entityId": "1184159390",
    "entityType": "Track",
    "nonce": "0x1c2a3f44370186a6564a9d63b04234283a3ade06d11891832f36fe9e379f5c56",
    "signature": "0x7c387131849c4c18e03ffa84443326ef8d072e89714e134315063d8a323123031489318bc3708860d528c00bda0b8264cb012e62d3864d765a3b2faac442690c1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}