{
  "manageEntity": {
    "action": "Save",
    "entityId": "483203983",
    "entityType": "Track",
    "nonce": "0x4b65134e6b1298d778c469d772a21d848e6bba73cf137c68a5f5b6913b9f993a",
    "signature": "0x601b7af553d3ab93095d1599a3d75785c42ae5b343eda755dcb3ffd83ee39b8b1ed4237f287455577c4e3c57bdafc538e6797de7351bafe54ae9a39069e557091b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}