{
  "manageEntity": {
    "action": "Save",
    "entityId": "552969743",
    "entityType": "Track",
    "nonce": "0x97991981927f3018720dcc1733cbf1e95173b8953358ec33f585d22bc0d30dd6",
    "signature": "0x493662cd521a2f41bfffad1c83dc5bf7d29bca1ff7da860f9c7b697d6274e2c62be95d19f06b68d952d55ef828953de64a5caed11c06a860f741d0f1636cba3f1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}