{
"manageEntity": {
"action": "Save",
"entityId": "1636579321",
"entityType": "Track",
"nonce": "0x18ae98f443abe4b8c40c9fc8a07851ba00afbcc351050783aaf8cab38a3cc50e",
"signature": "0xaa1f3bdcc1655d9e2377f638440323c9463a659c3cc893108477554df4d447b650aa8445a390eb64eab50605f076ccd575552d11ef388cf69ea79a9fd0d136a11c",
"signer": "0xF2c19977A72e7f63bBbD9063748E52c002b22f6b",
"userId": "957488166"
}
}