{
  "manageEntity": {
    "action": "Save",
    "entityId": "770059",
    "entityType": "Track",
    "nonce": "0x594915a4881b0d072c6fb09de9a789e0792de839be92258247ad6539198310e1",
    "signature": "0x92c0e73351f962ad185a81f82be3c55bf76dadce79d59ff5bce4c95340604b9644b4c139942919ad2cefd798a36d9189837889145e67beac8d9e07a0d3e294ce1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}