{
  "manageEntity": {
    "action": "Save",
    "entityId": "366373713",
    "entityType": "Track",
    "nonce": "0xe4fc8ff70404dbbe559c4944300394df80336bb1da86825f01991fd229f206e1",
    "signature": "0xdd727f109f8aaba59da1cd666bfb397d7c56325b0b31b53a08e6ce2eaf3ca6d90274531b1fce9396e016888e2ca9e78bcf2add708c0b5da3bd9d90297ac9af2f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}