{
"manageEntity": {
"action": "Save",
"entityId": "953446392",
"entityType": "Track",
"nonce": "0x74177b9616d27e3d54230c0f65d6b868743559b6204a38e872246c6e6b33f177",
"signature": "0xf9b40cd5df04541f402421e57dc8820dc3975764ee130a440420e37eeb212c603ad8c36b03600b83f41ce555a5cad7d87c5643025f06c680f587668f78636a261b",
"signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
"userId": "580720856"
}
}