{
"manageEntity": {
"action": "Save",
"entityId": "448126147",
"entityType": "Track",
"nonce": "1785530541693583380",
"signature": "0x08e4ce17a2b49fd731d70752d0b27f76cd183e09989a3a00d741f98f5b90644d0d4113aac0473e73a303f2a73de070bb7d57db1d518e3822a8c0c32a318107801b",
"signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
"userId": "568518925"
}
}