{
"manageEntity": {
"action": "Save",
"entityId": "1584647485",
"entityType": "Track",
"nonce": "0xa414b1dd7073a478e168e889efba77eb0ea3d3eb21750343e4de5afd98c763e7",
"signature": "0x1d84a7fb97911a82c78b692ee32941276a7966c8974efac0e52729ae929e5037351fbc60ba3585142fd6dc4a7646c8a1e7a10e83f217dfe1fb9976eadf30f1981b",
"signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
"userId": "580720856"
}
}