{
  "manageEntity": {
    "action": "Save",
    "entityId": "1273478335",
    "entityType": "Track",
    "nonce": "0xe1a3d3256b32a42e51e859187c2981c6388bf5694645cd1097ca5f0bbecfa203",
    "signature": "0x584d9e7193b9c09d278bda7824b59f6a2c7485c47d17ca68ce2d3613b6091a970314c2c5737d296425d0e97f3499476076c5df73a213f2e5b1a10e6a550b91cc1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}