{
"manageEntity": {
"action": "Save",
"entityId": "407017517",
"entityType": "Track",
"nonce": "0x6b968ddcece8372ff00ade66774794ddd5d3238bfaa0f33ad857a13c58b3ada9",
"signature": "0x81545af6c9bf2f0ac00796c69a4eac2351f3eb6bb55e389d42da026c459f04880c9bbccdc589b5b873a4f8a188bbac97a718b8417b53a6694d894cb89121e8f01b",
"signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
"userId": "714646433"
}
}