{
  "manageEntity": {
    "action": "Save",
    "entityId": "544133",
    "entityType": "Track",
    "nonce": "0xc02f75e09681324ace0f651905f50ba6ba2a1b0a7dcf7d8d24b6746246dfcbc7",
    "signature": "0x4304e4ec8743621bef1f9e57384107574b7b2b33a9731f28ceacb452359d97c65b6e79137170f5c802eff842db11f3fc7f00fa2c63150bb516ceff6359aa63f41b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}