{
"manageEntity": {
"action": "Save",
"entityId": "443301945",
"entityType": "Track",
"nonce": "1792480368167546549",
"signature": "0xc994cebe08108c455d392b3340928b8f79159c981ca2db854b5c2f1571fad418339bfb40433a99bd1a657817980f9255ae492643cf5928b147466f095f2145881c",
"signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
"userId": "568518925"
}
}