{
"manageEntity": {
"action": "Save",
"entityId": "899653167",
"entityType": "Track",
"nonce": "0xdaf645fc478cd8d6292afd8cb18db296005a9615a696b3a1f088ce810202cfd4",
"signature": "0x17a5d0deb649bcf04170eaeecf9d4b99125b58baf2fc88f897caa189c799d1671c8702d70595ded7e964479d396fae79e32a6bffd09cf880c338d8ba9b510bf51b",
"signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
"userId": "728570067"
}
}