Changes to Save keywords without tracking them

added the new path request parameter project_id

the request property keywords/items/oneOf[subschema #2]/cpc_cents became not nullable

the request property keywords/items/oneOf[subschema #2]/difficulty became not nullable

the request property keywords/items/oneOf[subschema #2]/intent became not nullable

the request property keywords/items/oneOf[subschema #2]/search_volume became not nullable

the request property keywords/items/oneOf[subschema #2]/source_seed became not nullable

the keywords/items/oneOf[subschema #2]/intent request property's minLength was increased from 0 to 1

the keywords/items/oneOf[subschema #2]/source_seed request property's minLength was increased from 0 to 1

the keywords/items/oneOf[subschema #2]/intent request property's maxLength was set to 80

the keywords/items/oneOf[subschema #2]/location request property's maxLength was set to 260

the keywords/items/oneOf[subschema #2]/source_seed request property's maxLength was set to 180

the keywords/items/oneOf[subschema #2]/cpc_cents request property's min was set to 0.00

the keywords/items/oneOf[subschema #2]/search_volume request property's min was set to 0.00

the endpoint scheme security AppOAuth was added to the API

added the new optional header request parameter Idempotency-Key

media type application/json was changed to a more specific media type application/problem+json for the response status 400

media type application/json was changed to a more specific media type application/problem+json for the response status 401

media type application/json was changed to a more specific media type application/problem+json for the response status 403

media type application/json was changed to a more specific media type application/problem+json for the response status 404

media type application/json was changed to a more specific media type application/problem+json for the response status 429