{
  "manageEntity": {
    "action": "Save",
    "entityId": "1595539011",
    "entityType": "Track",
    "nonce": "0xd58c0beab457ab360aa816edb3485605f60a03fc462cab993131938d54d1c97e",
    "signature": "0x87f8f8341f39c61af3b73a55f437554c74f58662581477599211e651bc66b57c16686c1caf437b988132e756287b4281dcc7b57aae768af46a67cb84bfac8bd61b",
    "signer": "0x1F9dC682fadBAc94c0Dd4ca2232a3f490704a737",
    "userId": "737872723"
  }
}