| slot | The slot at which the validator must propose block |
| slot_timestamp | Beacon Chain slot timestamp when the validator is scheduled to propose a block. |
| epoch | Epoch number of the validator duties. |
| epoch_timestamp | Epoch timestamp when the validator is scheduled to propose a block. |
| dependent_root | The block root that this validator duties is dependent on. |
| validator_index | The index of the validator in the validator registry. |
| pubkey | The validator’s BLS public key, uniquely identifying them. _48-bytes, hex encoded with 0x prefix, case insensitive |
| execution_optimistic | It’s true if the response references an unverified execution payload. The optimistic information may be invalidated at a later time. If the field is not present, assume the false value |
