Create companies and relationships

Here is an example of creating a few companies and relationships:

PUT https://api.avallone.io/v1/sync Authorization: Bearer <token> Content-Type: application/json {  "companies": [  {  "referenceId": "a",  "name": "a",  "registrationNumber": "a",  "incorporationCountryCode": "GB",  "parentCompanies": []  },  {  "referenceId": "b",  "name": "b",  "registrationNumber": "b",  "incorporationCountryCode": "DK",  "parentCompanies": [  {  "referenceId": "a",  "ownership": 25  }  ]  },  {  "referenceId": "c",  "name": "c",  "registrationNumber": "c",  "incorporationCountryCode": "PL",  "parentCompanies": [  {  "referenceId": "a",  "ownership": 25  }  ]  },  {  "referenceId": "d",  "name": "d",  "registrationNumber": "d",  "incorporationCountryCode": "DE",  "parentCompanies": [  {  "referenceId": "c",  "ownership": 25  }  ]  }  ] }

This would result with the following structure rendered: