{
"manageEntity": {
"action": "Save",
"entityId": "749972847",
"entityType": "Track",
"nonce": "0x25a5a4d178c3bdfaef754b1555c41b639c2b030b6c58b46d346695b623e7c358",
"signature": "0xe224ca1ddd29fb54a98a13c16d5f0aa23620c0fa42f3001c27fb6c44716cb116471c35ac0dd80d4e997f8ed87f0b0a82ac45261bc05308a99134e5e2b8cfc1d11b",
"signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
"userId": "714646433"
}
}