{
  "manageEntity": {
    "action": "Save",
    "entityId": "543048",
    "entityType": "Track",
    "nonce": "0x5a7712e5f3509b6e050db1b34a5a3e2e9ae9a07e6b7c66d261484d0674190b5f",
    "signature": "0x732d7c2a68ccf944645bf0b34beff8eef874855edb05c22c9e30186bd022c6e41d244111692d32fd26050f6cd7b1da690651db95457adc3b3a42ade32fbda69c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}