{
"manageEntity": {
"action": "Save",
"entityId": "2018400537",
"entityType": "Track",
"nonce": "0xd3de8d543aac28792e2e6b55058c7cec026d41294390b0d45c8b4f80c7f360a6",
"signature": "0xb6a6b1d827ae5f34914c11b51bb6ef4fcdd74bad819825852f5768863d4ad48c2ebc71c90eb7a11d2d6ff1c494cfda669d54351324ded6e2c419b391584433811b",
"signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
"userId": "489026160"
}
}