{
"manageEntity": {
"action": "Save",
"entityId": "1784827779",
"entityType": "Track",
"nonce": "0x563441302475552afcc409c06b4f2910e84311d6f9e116a94489d2265883eeac",
"signature": "0x00e15fc696a811e3f5cb4b29091e352eba06b85f90b61b988e14bca4e90d415c580157c28ec2f400f8b63e2e0f4cf4dc3d6f8ca1050220e23ddca903228f3ba11c",
"signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
"userId": "854614078"
}
}