{
  "manageEntity": {
    "action": "Save",
    "entityId": "927288",
    "entityType": "Track",
    "nonce": "0x081f2a6597d88ed7fed1550863d19f210a1c673b2dbfc35f8477d1d2a7baab84",
    "signature": "0xa878b4277bed92a1917056de59a6bd3d9b5eeb70d7a3dd93dfc843b95908cbc46b09911ff22b29b521a6bd050c5081d261695c8fcb97ea874becb604d2f52d101c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}