{
  "manageEntity": {
    "action": "Save",
    "entityId": "1420739464",
    "entityType": "Track",
    "nonce": "0x3dd14a820e3051cd2d3196a8dee704e058e3891da44b08e82e2a26829772f9fa",
    "signature": "0xc6c59998a2ca5ab42c1b5dc909e2934efc580c94db619a3e4f70127a78dbecdf6d94e8f9d74a6775fafc3c98a7e02b9384aac701a9e97da6ad781723ecb3b72e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}