{
"manageEntity": {
"action": "Save",
"entityId": "281251475",
"entityType": "Track",
"nonce": "1792848795843650213",
"signature": "0x543c6b090ac5819b6f5546b5c90d92f32b5a12d116c66c98afb4d7d98809c9517920ae1fabd61e0732af51c0960f20881a8b8a2822b325f5d102b72ed12c455b1b",
"signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
"userId": "451691735"
}
}