{
  "manageEntity": {
    "action": "Save",
    "entityId": "134021288",
    "entityType": "Track",
    "nonce": "0x06b9945cb13ad7a1ef950c42d6d7562efe21f27b945c5d3009714c671ae4bb35",
    "signature": "0x552f2635262c84df26074443b7dc4f874c308f3ffe1dd0d98447867a7050315d104aa306f5f2edd04f96992d0c8c57ed99f69ac8ac4c0b9c7eabd4cae67135001c",
    "signer": "0x4993C3631eecd6e8c1635351A99C2103C7d6Be4b",
    "userId": "906184213"
  }
}