curl --request GET \
  --url https://api.example.com/staking/validators/{validator_addr}/delegations/{delegator_addr}

{
  "code": 123,
  "msg": {
    "delegation_response": {
      "delegation": {
        "delegator_address": "<string>",
        "validator_address": "<string>",
        "shares": "<string>",
        "rewards_shares": "<string>"
      },
      "balance": {
        "denom": "<string>",
        "amount": "<string>"
      }
    }
  },
  "error": "<string>"
}