{
"manageEntity": {
"action": "Save",
"entityId": "259880442",
"entityType": "Track",
"nonce": "1787600677344308699",
"signature": "0x4b7fa62fb4194cde767f00444efe7ead09a5a6f47e4609e956a06f77f933a05832162a66dcf17edac16a833d3c08f81509419962bafb8fa5fe11ee91b7c5cc031b",
"signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
"userId": "451691735"
}
}