{
"manageEntity": {
"action": "Save",
"entityId": "821816393",
"entityType": "Track",
"nonce": "0x6334d2bd633e59c3f2cf5f17e429db890a32fa767e2b4313021f4e80db7b6438",
"signature": "0xc3f0e6a28d215a7082d79ed18f7e37c89dae19322da2dc366fef464288418bc02fb21914a38f062494ab6d946f1bba29f72df6681cb7de64160b3286be75e56d1b",
"signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
"userId": "636236864"
}
}