{
"manageEntity": {
"action": "Save",
"entityId": "1998774012",
"entityType": "Track",
"nonce": "0xa146a5bc83f43b023cc673d5e3331c2262150aa58b95ba32fa7e618ff6e6b1cf",
"signature": "0x5af99711f7a037f953f56b8c05aea29c10c974e6c960665cdc8e20d477697308465341224cf0473048dc039ff3f30d077d99e5dd419070390f77fb55bf6a3cc81b",
"signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
"userId": "620307004"
}
}