{
  "manageEntity": {
    "action": "Save",
    "entityId": "1108071424",
    "entityType": "Track",
    "nonce": "0xf1a253b39a955cb28a7897eea459afdb398df33c1bac53bca96f2f0dfb97ba65",
    "signature": "0x77da932b95b9870d11818730ac44128ed7240044ca329c14d5d2623477a5c8675cf27b019dced082dcb159bba0b5eb34628c8672e9c632c21fda395c608137d01c",
    "signer": "0x4810fE66B3A42DA4cb34b622aD9A069C293c6b86",
    "userId": "445042807"
  }
}