{
"manageEntity": {
"action": "Save",
"entityId": "971236239",
"entityType": "Track",
"nonce": "0x9825b9be0d64c6fbc7652e9e8f54efeca3677209b12ab54f415c20aa99d3971d",
"signature": "0x1743aeca681e5a1c8942035217351079c27f1eca5e7ba666953e51a96bc116c723e8c89b888dec37c892239bf8828470051081a4a2aa86ce6def10552bc594811b",
"signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
"userId": "325172820"
}
}