{
  "manageEntity": {
    "action": "Save",
    "entityId": "1856286480",
    "entityType": "Track",
    "nonce": "0xb018f3713020466a75b98f1a9fa1a9730e96103a440646925a6b021bd5c326c5",
    "signature": "0x6a04f1f4851699741c855ae19db9010dc94ca7a679bc848fa28fcaa2669be87b7772e88ad46353313cfddfdfbba7f04b8cf61f4092efc221cc1e7b9e5cfd0cbb1b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}