{
  "manageEntity": {
    "action": "Save",
    "entityId": "568481516",
    "entityType": "Track",
    "nonce": "0xd7aeb45f1f2fc1061df4647401ba31869a7af9d9c3c6112cfba9d2055f375d6c",
    "signature": "0xa95447cc7edada70b86a16d52ba0b04d6028100dadce10c8a72c89391bfa59c5249613e7ba24c2b0eca4de8b6d313ea12f4b86c62cb02ab921f801f6c19b3f7d1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}