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I am trying to parse a field from a nested JSON using postgresql. The form of a JSON has the following form: 

{"Field_1": {"Field_2": {"Field_3": "value_1": "xxx"}}}

I have read the question How do I query using fields inside the new PostgreSQL JSON datatype? and I have searched the proposed links, but I have not found anything to work.

{"Field_1": {"Field_2": {"Field_3": "value_1": "xxx"}}}

I want to parse the xxx of value_1.

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Your JSON have incorrect syntax, this is correct one: 

{"Field_1": {"Field_2": {"Field_3": {"value_1": "xxx"}}}}

Then you can:

select j->'Field_1'->'Field_2'->'Field_3'->'value_1' from (
    select '{"Field_1": {"Field_2": {"Field_3": {"value_1": "xxx"}}}}'::jsonb as j
) t
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