Add Sub-Issuer

curl -X POST "https://api.trusset.org/stocks/api/manage/0x1234.../sub-issuer/add" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: trusset_abc123xy_secret..." \
  -d '{
    "account": "0x9876543210fedcba9876543210fedcba98765432"
  }'

const response = await fetch(
  `https://api.trusset.org/stocks/api/manage/${tokenAddress}/sub-issuer/add`,
  {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-API-Key': 'trusset_abc123xy_secret...'
    },
    body: JSON.stringify({
      account: '0x9876543210fedcba9876543210fedcba98765432'
    })
  }
);
const { data } = await response.json();

{
  "success": true,
  "data": {
    "success": true,
    "txData": {
      "to": "0x1234567890abcdef1234567890abcdef12345678",
      "data": "0xb2c3d4e5...",
      "value": "0"
    }
  },
  "metadata": {
    "requestId": "550e8400-e29b-41d4-a716-446655440000",
    "timestamp": "2025-06-15T12:00:00.000Z",
    "instanceId": "inst_abc123"
  }
}