{
  "request": {
    "derivation_path": "mykey",
    "app_public_key": "bls12381g1:6KtVVcAAGacrjNGePN8bp3KV6fYGrw1rFsyc7cVJCqR16Zc2ZFg3HX3hSZxSfv1oH6",
    "domain_id": 2
  }
}