{
"manageEntity": {
"action": "Save",
"entityId": "509779562",
"entityType": "Track",
"nonce": "0xbf58c7cc23ee214ae36f27c11e86cf7dbff5e6c5d94a340280421ea86ae422e7",
"signature": "0x24035a35462c7f98e53069b3912dbd42f6d1ac4651f04c5763dbc5941694826146df33fe9185ba91fd6226793c74d966536b7789f2ea09aa4ca233840514d61e1c",
"signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
"userId": "667809204"
}
}