{
  "manageEntity": {
    "action": "Save",
    "entityId": "319394",
    "entityType": "Track",
    "nonce": "0x3867f048012c87e23627e2238b54b22dbb4f2da338540e5c0953db6f95a98789",
    "signature": "0xaaad9b2810467577b56be1ef4e51f814bd8495985684f28dfc5b23f3018b43af2ab8bdb45686ea0440ee6c9b3afb004180f3903d9d6ae3935bcfcc0dcb0e3e221b",
    "signer": "0xDf2ffE41EC259B85B3F9C88700b293499D4Ae6C5",
    "userId": "339350040"
  }
}