curl --request POST \
  --url https://api.lemlist.com/api/leads/notinterested/{leadIdOrEmail} \
  --header 'Authorization: Basic <encoded-value>'

[
  {
    "firstName": "Bastien",
    "lastName": "Velitchkine",
    "companyName": "Bastien VELITCHKINE EI",
    "jobTitle": "Growth Engineer",
    "companyDomain": "bvelitchkine.com",
    "email": "support@lemlist.com",
    "preferredContactMethod": "email",
    "industry": "Technology",
    "Company name": "Bastien Velitchkine",
    "_id": "lea_mizMsAEkRrJuhouYe",
    "isPaused": false,
    "campaignId": "cam_9NsHPnykWESTncCW8",
    "contactId": "ctc_Rofmb6uNGyaPNZ2ni",
    "emailStatus": "deliverable"
  }
]