{
  "manageEntity": {
    "action": "Save",
    "entityId": "1709364431",
    "entityType": "Track",
    "nonce": "0x00dbf9582bc0624fafbb686828fee503472a15915718cbfc0ca18710a1442a09",
    "signature": "0x50739e24742f491636f8ecd023b15258a6ed244f121f984421ee69adcbf7355940024ccea782b1ea276536f24caac677ce0946b2fdeee6c11f78e12a0b2b8b0e1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}