Each User object contains a single cluster property that groups all the User IDs for 1 user:
{
   "cluster": [
      {
         "user_id": "836f82db99121b3481011f16b49dfa5fbc714a0d1b1b9f784a1ebbbf5b39577f",
         "type": "EMAIL_ID",
         "is_hashed": true
      }
   ]
}{
   "cluster": [
      {
         "user_id": "86e0b9e56c17cc4d12387e1949b85053fbe73bc3ce5a1188713a9d300cc6133d",
         "type": "EMAIL_ID",
         "is_hashed": true
      },
      {
         "user_id": "00000000-89ABCDEF-01234567-89ABCDEF",
         "type": "DEVICE_ID",
         "is_hashed": false
      }
   ]
}{
   "cluster": [
      {
         "user_id": "072ae592cac43a9108cfe86c9b744df3d0798427928bd9cfc962c8aa3402e176",
         "type": "EMAIL_ID",
         "is_hashed": true
      },
      {
         "user_id": "ce933dfc21a71c43136deeaf23d1e148328ba0a1f21b8938ae6a780760a64905",
         "type": "EMAIL_ID",
         "is_hashed": true
      },
      {
         "user_id": "01234567-89ABCDEF-01234567-89ABCDEF",
         "type": "DEVICE_ID",
         "is_hashed": false
      }
   ]
}
Guidelines
- If you need to pass multiple email addresses and multiple Device IDs for the same user, group all of them in the same cluster.
- Do not group email addresses or Device IDs for 2 different users in the same cluster.
