{
"manageEntity": {
"action": "Save",
"entityId": "813769283",
"entityType": "Track",
"nonce": "0xd9fd87fdf6e636b9175167c85d3771e98334644797afe40fae79f7b62c3c683e",
"signature": "0xcdafdb938b52b5012bb1eaeba7dec79f5e8cac8d3f4580dda4b7cf703e040e8b586ada424bee0b596e10c444835c8d57a14c214411ab2a55b20da6f4c45be4f91b",
"signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
"userId": "580720856"
}
}