{
  "manageEntity": {
    "action": "Save",
    "entityId": "40209",
    "entityType": "Track",
    "nonce": "0x8a5dd9415265934e0b11b982d07971b44983a6540992742336f87d8a7e41dc35",
    "signature": "0x27c7086eb222549414d114321a477a99e36d8fa7e86c400c7eafa8cab74799a366bbb7cb14a66f258a2e2dd58ca8a602811e028e6afecd263fa8b5002ebbc79f1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}