{
"manageEntity": {
"action": "Save",
"entityId": "578517867",
"entityType": "Track",
"nonce": "0x6601a3b5d91dd9b9e97b2337c431e1ffc7f64a78621b08f852114fdd8635f08f",
"signature": "0xf5d3974ca3229b008ed30cabd0f811c53b509a02fea18744bd2f527486f9dcf805ebe683dfc2fd545f3cf2a5c22af5070b8af93503e8aaeaa2f3230dd1c29fba1c",
"signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
"userId": "100976759"
}
}