{
"manageEntity": {
"action": "Save",
"entityId": "595446979",
"entityType": "Track",
"nonce": "1792417283141388829",
"signature": "0x5ab504b0dd141c5943700fec4768e7401c5ebfe9b72bfeb27524862bcdef616b421369e264712f11b5e2900c77ffdee7c0767f45e30f617158fbdafae22664281c",
"signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
"userId": "451691735"
}
}