{
  "manageEntity": {
    "action": "Save",
    "entityId": "246333800",
    "entityType": "Track",
    "nonce": "0x7c9a6676d41d5ac4c18f199744400da1db5acb17db1f64e076d26fb428035945",
    "signature": "0x7fbe0c56e462193c53c41b2462ad9017740641011896a5872387c3d22ed3b83c3705ea5ba161e5a4c9b7ffd9b5e961c80ab0cf2051ced5d26706c92557d777a01b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}