{
  "manageEntity": {
    "action": "Save",
    "entityId": "761480712",
    "entityType": "Track",
    "nonce": "0x3c210e207f1590700a90d3dda5270bab5b63a9fcedc0a54f1f1636f955ee7798",
    "signature": "0xcf54a6cbb9719e2433ab4d2239828418e3120f0a84d81968407277c0d9d1bac7456f74b2efbd9a4e124b2ee32e3e292e7946b3cf1cdbe0199a14ad0c6efd5be41c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}