{
  "manageEntity": {
    "action": "Save",
    "entityId": "1995524591",
    "entityType": "Track",
    "nonce": "0x65670ff2673d8693d3b7400d00dd5f444ae46dcbe8992c08a1aca27e885666be",
    "signature": "0xb6573e1389119acfbfe409ab8df4a0c99821e9574da7a654bf9bf87dbf9fca8163b94f64d731ed586ef7aa1b99187c1c41086adae76e8a9c09dbd6a03d8392741c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}