{
  "manageEntity": {
    "action": "Save",
    "entityId": "2005017288",
    "entityType": "Track",
    "nonce": "0x76e48795e58314ad9620f03cc91442a485559c0b8baa0300b5b75c29dbd4eba4",
    "signature": "0x3ae182756d58e37f45980cdb2db53b8bef3a1d8e1c13d9af6c541943d438203967363b194edea53acbe221fc97c6bc26eb4d46a9362dcdf3de8541bb961dc34e1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}