{
  "manageEntity": {
    "action": "Save",
    "entityId": "1598007080",
    "entityType": "Track",
    "nonce": "0xccb74e67f6bda0676735d4927ee8648e08b771ca8b9875a12ed366f2b71d68f4",
    "signature": "0x9545d4eb90e744f7ac5c4dcf35bba8e80fc9f657412b39be618e8a0d7fc376bb0ce0565ede64158071703d8c8d00db014420dcbc754227703bc5b3b4984476751c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}