{
"manageEntity": {
"action": "Save",
"entityId": "818412040",
"entityType": "Track",
"nonce": "0xda6f9f9be761f4b35b41deb3472531f6009350c84d8b74f29cd3917add732019",
"signature": "0x9c4e94690dc881ee6e7300039a23577abf8fb14961aeff0c28b71c6698b6dfe9060a83936c954c73dceaf7f479358755a99374d4f05d594a5ce99252027b2a521c",
"signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
"userId": "887547386"
}
}