Help creating notes via API - BodyV2

Are both blocknote and markdown required? This appears to be the case but is somewhat redundant.

"bodyV2": {
    "blocknote": "string",
    "markdown": "string"
  }

"bodyV2": {
    "blocknote": "string",
    "markdown": "string"
  }

"bodyV2": {
    "blocknote": "string",
    "markdown": "string"
  }

"bodyV2": {
    "blocknote": "string",
    "markdown": "string"
  }