{
"manageEntity": {
"action": "Save",
"entityId": "800678497",
"entityType": "Track",
"nonce": "0x9a2022626c4a7df5deee6d458224cce1cddf2d4ad5ba573d8351ec197c995029",
"signature": "0xa807edf0e653bc4173168abd35b47d0437b8ff49f3e4520ac8187cb10b0a63820fdbd08eb871a3c3eaf2cd496be428db44102d7c75d5980e69a7a9b52213ea2a1c",
"signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
"userId": "77551267"
}
}