{
  "manageEntity": {
    "action": "Save",
    "entityId": "1191049822",
    "entityType": "Track",
    "nonce": "1785859928068628538",
    "signature": "0x48f76a2714759f49a1c9c93f16d12cc70c7271414c9069a62ed2346b7a3c05e4166d57d9609d008412ac019f13ae1d12f743fc80f17a2525ddbd459f62da24591c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}