Add to favourite or block an interpreter
POST /person_relations
{
    person_id: integer, // current person who performs an action
    relation: {
        target_id: integer, // interpreter
        attitude_type: 'favourite' or 'blocked' string
    }
}

Remove from favourites or unblock
DELETE /person_relations
{
    person_id: integer, // current person who performs an action
    relation: {
        target_id: integer, // interpreter
        attitude_type: 'favourite' or 'blocked' string
    }
}

Show blocked interpreters [default:false] param for filtering:
params[:blocked] = true/false
params[:rater_id] = integer // current person who performs an action

Show only favourite interpreters [default:false] param for filtering:
params[:favourite] = true/false
params[:rater_id] = integer // current person who performs an action

Get all blocked interpreters
GET /people/:id/blocked_interpreters
{ id: integer }

response: undefined until designs will be completed