{
  "manageEntity": {
    "action": "Save",
    "entityId": "357374",
    "entityType": "Track",
    "nonce": "0x128dccac9d10b398cd24e4f23a69651fc4e0ffadb8b47f1161f5dd061fbb34ec",
    "signature": "0xa193841eac4fb99cc0438bdff6a6d508167253a77730ed985e7d6be1240050b72c022f1330027e24f97d91c6b02087ffbc7354b00e0e67f6038cacc9c5d6abc31c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}