{
  "manageEntity": {
    "action": "Save",
    "entityId": "264699",
    "entityType": "Track",
    "nonce": "0xf682e767176b2f041bfa7e06026d5215e8c024cb0f1f9b8bc3a567c3a8bdedf4",
    "signature": "0xbb06ad1e2e2ddca77f6877e15de749791065c05df506e9854f23adac2d42a2a7242221018e1855993670d1bb6076d189fdbfa3860a9af12846f42b6ed841e3e81b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}