{
  "manageEntity": {
    "action": "Save",
    "entityId": "1593863098",
    "entityType": "Track",
    "nonce": "0xbc819a9374f9c5e0badeab5a9b258e590b8dfce55d21af863134ebfbba07b1bd",
    "signature": "0xac9d1a8c13eb893d427596cdb456a6d8381bf6d0ccf5238a6788689817a02f71428cbf78dbb0ad2594f63f5942df05dff22b144932e72016813449e394cc1ce71b",
    "signer": "0x4993C3631eecd6e8c1635351A99C2103C7d6Be4b",
    "userId": "906184213"
  }
}