{
"manageEntity": {
"action": "Save",
"entityId": "662377030",
"entityType": "Track",
"nonce": "0x43579bcd2915ea1f0ca533af7f7b7ee967703cbd75e9c70a9d7e0e6f7a4d4dc7",
"signature": "0xc20f680834194a9c6d3672e240f67df64db01a77604c344907a19d19db8e70e3409c0746abeb2cff501ec9506bef4e86d40cb2067ade52fd4bee9bd44dacee391b",
"signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
"userId": "77551267"
}
}