Add Extensions to a Library

POST  /libraries/:library_id/relationships/extensions

curl https://reactor.adobe.io/libraries/:library_id/relationships/extensions \
  -H "Accept: application/vnd.api+json;revision=1" \
  -H "Content-Type: application/vnd.api+json" \
  -H "Authorization: Bearer [TOKEN]" \
  -H "X-Api-Key: [KEY]" \
  -H "X-Gw-Ims-Org-Id: [ORG_ID]" \
  -X POST \
  -d \
'
{
  "data": [
    {
      "id": "EX2c6415b721e9425e94aed1ad019d2fc1",
      "type": "extensions"
    }
  ]
}'

{
  "data": [
    {
      "type": "extensions",
      "id": "EX2c6415b721e9425e94aed1ad019d2fc1"
    }
  ],
  "links": {
    "related": "https://reactor.adobe.io/libraries/LBb90caf2669004395b38c44de087cd97b/extensions",
    "self": "https://reactor.adobe.io/libraries/LBb90caf2669004395b38c44de087cd97b/relationships/extensions"
  }
}