{
"manageEntity": {
"action": "Save",
"entityId": "595446979",
"entityType": "Track",
"nonce": "1792417290998740617",
"signature": "0x1da9b218d99a2caae4bcfc473914ed39fcf98d0064250df5a9997c9668eea44e602ec42b51444900234b453483ec7b054248647fc981f5e176d20ccb44db08c31b",
"signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
"userId": "568518925"
}
}