{
  "manageEntity": {
    "action": "Save",
    "entityId": "328977499",
    "entityType": "Track",
    "nonce": "0x5095a1397316f9e06eef23f79bfbd5f954d1650072663fb8d6a3c568689d41cf",
    "signature": "0xcc427a2cf992148d0abede71661450f49fcf47610e7e24bcfcc8d501d18848b87ac5caa59db3b1cd5d86d094d0c27b9d1d071eaaa723ef97b59d4f30268367b11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}