{
  "manageEntity": {
    "action": "Save",
    "entityId": "1765638734",
    "entityType": "Track",
    "nonce": "0x520848fa7f5e042fdd427bc859ac9373de85763fb36e915cfcf64257f3a7bf12",
    "signature": "0xadcd806ca1cdd008bfc2fb83e42d9384116ef968ea3296ad3f0088e2856812b314da85aa0ffaee0e32cd43c3e8abc3a009ad511a56a4b4581d5af7ed4fdbe0cf1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}