{
  "manageEntity": {
    "action": "Save",
    "entityId": "1047778373",
    "entityType": "Track",
    "nonce": "1789879371791948509",
    "signature": "0x5344a88000ff7ab514b946912b20c3b6efc82fb7e0282e2b4d86ed969b7e6d772a1c49fcbc3b8507c28ff68de2d6dbc785e103ca672b19c07e59355cc875af791b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}