curl --request POST \
  --url https://api.sendrealm.com/project-operations/templates_test_email/prepare \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'X-Sendrealm-Project-Id: <x-sendrealm-project-id>' \
  --data '
{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "domain_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "to_email": "jsmith@example.com",
  "from_email": "jsmith@example.com",
  "reply_to": "jsmith@example.com"
}
'

const options = {
  method: 'POST',
  headers: {
    'X-Sendrealm-Project-Id': '<x-sendrealm-project-id>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    domain_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    to_email: 'jsmith@example.com',
    from_email: 'jsmith@example.com',
    reply_to: 'jsmith@example.com'
  })
};

fetch('https://api.sendrealm.com/project-operations/templates_test_email/prepare', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.sendrealm.com/project-operations/templates_test_email/prepare"

payload = {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "domain_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "to_email": "jsmith@example.com",
    "from_email": "jsmith@example.com",
    "reply_to": "jsmith@example.com"
}
headers = {
    "X-Sendrealm-Project-Id": "<x-sendrealm-project-id>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

{
  "status": 123,
  "data": {
    "prepared_action_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "operation": "<string>",
    "expires_at": "2023-11-07T05:31:56Z",
    "effects": {
      "operation": "<string>",
      "project_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "resource_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "input": {
        "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "automation_effects": "suppress"
      },
      "sends_messages": true,
      "may_deliver_messages": true,
      "deletes_resource": true,
      "automation_effects": "suppress",
      "irreversible_deliveries_are_not_recalled": true,
      "current_status": "<string>",
      "readiness": {},
      "delivery_at": "<string>",
      "recipient": "<string>",
      "version_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "registered_devices": 123,
      "campaigns": 123,
      "dependent_campaigns": 123,
      "consequences": [
        "<string>"
      ],
      "retry_step_key": "<string>",
      "definition_version_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
    }
  }
}

{
  "status": 123,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": "<string>",
    "issues": [
      {
        "code": "<string>",
        "path": "<string>",
        "message": "<string>"
      }
    ]
  }
}

{
  "status": 123,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": "<string>",
    "issues": [
      {
        "code": "<string>",
        "path": "<string>",
        "message": "<string>"
      }
    ]
  }
}

{
  "status": 123,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": "<string>",
    "issues": [
      {
        "code": "<string>",
        "path": "<string>",
        "message": "<string>"
      }
    ]
  }
}

{
  "status": 123,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": "<string>",
    "issues": [
      {
        "code": "<string>",
        "path": "<string>",
        "message": "<string>"
      }
    ]
  }
}

{
  "status": 123,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": "<string>",
    "issues": [
      {
        "code": "<string>",
        "path": "<string>",
        "message": "<string>"
      }
    ]
  }
}

{
  "status": 123,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": "<string>",
    "issues": [
      {
        "code": "<string>",
        "path": "<string>",
        "message": "<string>"
      }
    ]
  }
}

{
  "status": 123,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": "<string>",
    "issues": [
      {
        "code": "<string>",
        "path": "<string>",
        "message": "<string>"
      }
    ]
  }
}