{
  "manageEntity": {
    "action": "Save",
    "entityId": "854761",
    "entityType": "Track",
    "nonce": "0xc46f629d4bb557aec4ff6f063797562313db115cd1df174caf2ccd6d29f5da9e",
    "signature": "0x6c1a897ef376626881ea75a06f8012a42ae741bccbe77c0ae235cb7330e4afb83e85e9db0618ba268847080f90a3d3d98f996cd299a6ad594a362245cb60816e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}