{
"manageEntity": {
"action": "Save",
"entityId": "722702556",
"entityType": "Track",
"nonce": "0x51931d76054fede442992482c77b5cf13c23eccf86e0c90acfe0e063ed8b63f0",
"signature": "0x18fdde6934716e9ddbe7298eda9e474a1edf03a55c4f559a2dd91bbb90dc17f261214cef5054ae5f55e50f07def6be8519e5801e0f19a3af8841185a425de3ff1b",
"signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
"userId": "714646433"
}
}