{
"manageEntity": {
"action": "Save",
"entityId": "1890650636",
"entityType": "Track",
"nonce": "0xa4f16bcf497b78fb47f1fecd43617a766c160ceb72eeb08037ed8c361f237323",
"signature": "0xfd0512758ee5c9ccc9f30f6d0c9599979c51c576a8b74329b45ea65f14b9141e01626493829a0080979acf21542c2d7908866a43052b95b93c9b4760e138d6a41c",
"signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
"userId": "620307004"
}
}