{
  "manageEntity": {
    "action": "Save",
    "entityId": "1647059820",
    "entityType": "Track",
    "nonce": "0x463f166a6ce26486b39cad4fc00b36cc988bea1a0671434258afd8fad973eb39",
    "signature": "0xa17898d9cf8f70e71bebdcf98948efa611cab54c7f9f3122d4c5e244a509cc8d6dc9318a1664eeb64eddc26bd11bf1c16034def2fa36e838bb3f5a2bcd3762801c",
    "signer": "0xd12A323399559A3773F865c8F21031bc39c29135",
    "userId": "219968466"
  }
}