{
  "manageEntity": {
    "action": "Save",
    "entityId": "180648319",
    "entityType": "Track",
    "nonce": "0xc249360d0d9db8a3abea14add2d241a40cdf143a995df60325d63659afa39338",
    "signature": "0x1eb9454106343c0113f966646ea56ec41a05fcb48672b63057a0db349c63d2e3234ad2c4ccdc7cf992589a658b86124e845d096299dbb12ee564d1e2a4e868df1c",
    "signer": "0xE7A4a8f1d081B44C96Ed68610B6c3016ce8cD6E0",
    "userId": "464427506"
  }
}