{
  "manageEntity": {
    "action": "Save",
    "entityId": "764130451",
    "entityType": "Track",
    "nonce": "0x8b05b795f04c05fb13f1b8dba80219aec89cbdd80f37c54c45391561654f74d4",
    "signature": "0x42ee70a70e63d8512332845f4dd038fd1379b599e6d186c2adb599f230c41bfd571d74711f5b5fc868b8a0d4009c62b3f80cf3d51b3ec9c8b2b9830f3e9575491b",
    "signer": "0x96818aB6687d2E9bA070EB1d6843ef7BfEF5cDa4",
    "userId": "806873848"
  }
}