curl --request POST \
  --url https://sandbox.api.app.firstsales.io/api/v1/organizations/{orgId}/workspaces/{wsId}/contacts \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "email": "jsmith@example.com",
  "listId": "<string>",
  "source": "webhook",
  "firstName": "<string>",
  "lastName": "<string>",
  "fullName": "<string>",
  "headline": "<string>",
  "linkedinUrl": "<string>",
  "company": "<string>",
  "title": "<string>",
  "phone": "<string>",
  "location": {
    "city": "<string>",
    "state": "<string>",
    "country": "<string>"
  },
  "enrichment": {
    "source": "<string>",
    "enrichedAt": "2023-11-07T05:31:56Z"
  },
  "timezone": "<string>",
  "customFields": {},
  "tags": [
    "<string>"
  ]
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    email: 'jsmith@example.com',
    listId: '<string>',
    source: 'webhook',
    firstName: '<string>',
    lastName: '<string>',
    fullName: '<string>',
    headline: '<string>',
    linkedinUrl: '<string>',
    company: '<string>',
    title: '<string>',
    phone: '<string>',
    location: {city: '<string>', state: '<string>', country: '<string>'},
    enrichment: {source: '<string>', enrichedAt: '2023-11-07T05:31:56Z'},
    timezone: '<string>',
    customFields: {},
    tags: ['<string>']
  })
};

fetch('https://sandbox.api.app.firstsales.io/api/v1/organizations/{orgId}/workspaces/{wsId}/contacts', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "requestId": "<string>",
    "details": {}
  }
}