{
  "manageEntity": {
    "action": "Save",
    "entityId": "1518298576",
    "entityType": "Track",
    "nonce": "0x8e104980a6d23f61876394a5cdb77b9cabceb71fb6a73282ffbd2acb9a8d2ac4",
    "signature": "0x99127388bb7a96dd6fee8ef5ee051837806d6e20b9c696089a6d498eb8955d4d3863cb4d0d40ab631bfc3412f8312f288564994cd29eafefa698e74a9537af931b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}