{
  "manageEntity": {
    "action": "Save",
    "entityId": "1300062234",
    "entityType": "Track",
    "nonce": "0xd73f22376e50d7343bd3e9be35fe754e950c0b56e66f164e12b159eaee30b4d3",
    "signature": "0x573032e282c8a17079f37c17ba13fd8cbedf37f59bf9f8ba89fef143141e97593b9a4e294b08c48185622517899bd12c3468870d74011a5e94c66716cb8446671c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}