{
"manageEntity": {
"action": "Save",
"entityId": "1897531810",
"entityType": "Track",
"nonce": "0x52069eeba71ea3099d017f96f79fbdef7b9615c8a596d9c4787c1021c41bc253",
"signature": "0x4234f0ab638414faf6ba0873508cfd5e9af48204848c4dfe7a56332cbdb51bdb4943b8c574c65779d4a3928764c509342727e9363f9133768bbe513e658194281b",
"signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
"userId": "620307004"
}
}