{
"manageEntity": {
"action": "Save",
"entityId": "18120012",
"entityType": "Track",
"nonce": "0x2a9be4c57e634f5ccfffa834638dd61f23b7b71beb6206940d070f4e30a7e282",
"signature": "0x35946c0faa639a3db6b7577786855c0a5344533b7d553b1cf2fc3fd52140663d3d2a7014dafa6e87b8986df409f08a83aee21ce963ab05803de81e90b5389c6d1c",
"signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
"userId": "854614078"
}
}