{
  "manageEntity": {
    "action": "Save",
    "entityId": "584727030",
    "entityType": "Track",
    "nonce": "0x98ca502091dbc057acf5b4a17e9adbc01d3c0462b9e5476690d88ec1624eb77b",
    "signature": "0x6d216474a782744e36e0d2f738f655c9e93f3f22054cea02b91c7953c80c355720c9ae9bce71171bd5267c42d6b8b4f5d99e7375b148c361dd6bb67681cdd04a1c",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}