{
  "manageEntity": {
    "action": "Save",
    "entityId": "934358367",
    "entityType": "Track",
    "nonce": "0x627e23f63f03ccf24d24266e2af37af9aa2de1fbce1ce23f2a7dbd91898292d1",
    "signature": "0xe9c82bc4f86c99f3770ec0d4d08e6239a9bc8f16953545097b9dd0808d02f1ab70dcb74199d08091b8aac60d21a7c4a25ffda879e59505911004ed70a8c742941c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}