{
"manageEntity": {
"action": "Save",
"entityId": "821816393",
"entityType": "Track",
"nonce": "0x449bc3734339cd6710571ac437ffe3db8ea8e85093659af3ec8d2c332dd640d2",
"signature": "0x5005ed591598dee5e0fb83c966521079151f7fa82758a5293a5586f168b87ab150cc032f5647561468e340cc3c4663a011aaf16f6be20754b7042dcfbd866b861b",
"signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
"userId": "620307004"
}
}