{
  "manageEntity": {
    "action": "Save",
    "entityId": "1953951062",
    "entityType": "Track",
    "nonce": "0x6ebd340638c981d2270345c0ef60b4ea365544d88b5443c6f99f3543a8152461",
    "signature": "0xb7b68011cd82490a21c875ec9615b961d0d915bb8d395ed3445158ad6ece44cd025d3225d5da75b36dfa7ddfaf2feb6f056b02be8487b425f4235c9b5589000e1b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}