{
  "manageEntity": {
    "action": "Save",
    "entityId": "514317",
    "entityType": "Track",
    "nonce": "0x13079773a355e759581d86d7bcd927c125cb4c48c8e217c54f50383610d38b30",
    "signature": "0xc9256c2f031e6dd0f2b6ab34a40c91fa5acb620256353984ed646a998ac203bb75f6b2d7b6f8462f9313b0fff21808d231b73a86b5096dcac7d4481742b6ebe11c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}