{
"manageEntity": {
"action": "Save",
"entityId": "337120648",
"entityType": "Track",
"nonce": "0xa528825f212abad02dcebd492d28eeedfcce2f87dac1dc65b965cf31ccb3e9dc",
"signature": "0x786a75407eef4e94e9c884978f3c5444eeefd664d7b26e0fc431ab893309329534d96ee0305296ad75b787622805a64ccca3c51380f7f46843b654c2b16a945a1b",
"signer": "0xC56E1ccbA93c1E645e5F27Bf8A5ca13eB7A5eEbe",
"userId": "335878078"
}
}