{
"manageEntity": {
"action": "Save",
"entityId": "1387031367",
"entityType": "Track",
"nonce": "0x4b7503abe4b311a1ea506b8b99c349e2a53b406f6503e467193f78848631971e",
"signature": "0xb86dd2c8f90db86453651456c5c9ec8b605b406dc2303b9089351aa5624206040846bf11fbf7d3a623a1d3ca5ae512a1b8d554afaafd2be26166ea9523c7fafe1b",
"signer": "0x766d742Cc35188990Dc38CaD8006DEcEe3fAFed5",
"userId": "353834"
}
}