{
  "manageEntity": {
    "action": "Save",
    "entityId": "228427",
    "entityType": "Track",
    "nonce": "0xf9915078f2e1ffe73a98d05c5f6017644fd7e66577ba1c59f06facc6cca169ea",
    "signature": "0xf6f9352e0541b15389643e9843570aff5bbd5a106c48af1d3cb8c42b672c2c0803b527db49a4c97683b8492f85e5ee6f8e6b5aae1a372ab3d38509740bb9e39f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}