{
"manageEntity": {
"action": "Save",
"entityId": "384419791",
"entityType": "Track",
"nonce": "0xfedb2576f3c081a66848765fd898588c76ca4c327ae64c9156707bd11f8caf6c",
"signature": "0xb76239964d458f0fcb65c9d1304e4dcac355f9f0931df0c2234b3a21112dc11f77f28d8946b16c52f28b72fb8b5f7ae2fe29fa0bcc12e7f4def0324d92aa57fe1b",
"signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
"userId": "881446128"
}
}