{
  "manageEntity": {
    "action": "Save",
    "entityId": "830444893",
    "entityType": "Track",
    "nonce": "0x54f99448836cf3285040f280c852a14e0adc78345f4e5cc533754259aed0f4de",
    "signature": "0x3e8a20521ac2b5d7702e12c03c73878cdc9b4bcccb557d19ab6e4390112743537a7540b30231a9082e08b5659f792a7c145482e2992f24d8cc3da545919aa1f31b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}