curl --request POST \
  --url https://api.sandbox.immutable.com/v1/chains/{chain_name}/collections/{contract_address}/nfts/mint-requests \
  --header 'Content-Type: application/json' \
  --header 'x-immutable-api-key: <api-key>' \
  --data '
{
  "assets": [
    {
      "reference_id": "67f7d464-b8f0-4f6a-9a3b-8d3cb4a21af0",
      "owner_address": "0xc344c05eef8876e517072f879dae8905aa2b956b",
      "token_id": "1",
      "amount": "1",
      "metadata": {
        "name": "Sword",
        "description": "2022-08-16T17:43:26.991388Z",
        "image": "https://some-url",
        "external_url": "https://some-url",
        "animation_url": "https://some-url",
        "youtube_url": "https://some-url",
        "attributes": [
          {
            "trait_type": "Aqua Power",
            "value": "Happy",
            "display_type": "number"
          }
        ]
      }
    }
  ]
}
'

{
  "imx_mint_requests_limit": "<string>",
  "imx_mint_requests_limit_reset": "<string>",
  "imx_remaining_mint_requests": "<string>",
  "imx_mint_requests_retry_after": "<string>"
}