{
"manageEntity": {
"action": "Save",
"entityId": "1917611770",
"entityType": "Track",
"nonce": "1792384409401353590",
"signature": "0x20429cadb2eba811e650fa127385c8dfea30640f9ed63a7469674e53c832f91a6195ca55f7e844f05aaf0d479bb4367b8c6e14daf874eab0a7a2e19254d602241c",
"signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
"userId": "568518925"
}
}