{
  "manageEntity": {
    "action": "Save",
    "entityId": "1642271415",
    "entityType": "Track",
    "nonce": "0xd1224584e28fdcc8e7d6f14aa517f7250fec795074b5208564575acca8c7fc46",
    "signature": "0xc9f2827bc957f1574478e1ebec655f0ff3ff6815f044f1f17300a439d5f8703e46b1ab3231fd86c08f27c0d0099a140a35bca32f8e2ef98d1246b3c577ad4c721b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}