{
"manageEntity": {
"action": "Save",
"entityId": "1781737336",
"entityType": "Track",
"nonce": "0x6d070fe7d34b688139a2367e940c0842900c45332d3a5c331497cf16a7801454",
"signature": "0xac88f1c58e83ae1e7d9b9c26e7b119e336189104a5993ed517f8a8158fc2c02939d5e2a9a00c4be472243a051bfee9e94802387297e1c57b1cf6bc517035fbe81b",
"signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
"userId": "100976759"
}
}