{
"manageEntity": {
"action": "Save",
"entityId": "648193382",
"entityType": "Track",
"nonce": "0x03b0454abbd2157c97f563404be46fea7c37eeb3576907e89640dac0f16f192a",
"signature": "0x5176a3fddbfdafe4195c8776f7d8572677fe33ea5da4eb6f1dc2bc649dd6f2cc0b4dcfd71ff5f42662c901ebf56d7cbce73941b5f1371c369e07f25379e6b9841c",
"signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
"userId": "714646433"
}
}