{
  "manageEntity": {
    "action": "Save",
    "entityId": "1150675721",
    "entityType": "Track",
    "nonce": "0xb2b4be6efc24aa0d8db0eb92c553a2400c7120b1e83225702a4fbeb001cc7189",
    "signature": "0xab49efbc006a84c6d8296a15a0553a24dad92fb1fbca7d3d2562f529c738debc1071f7b7429345895833c0ee778940019223d6506b30b8b5a67dc44258964f1a1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}