Design a professional email signature for a digital marketing manager.
Name: John Johnson
Profession: Digital Marketing Manager
Contact: john@example.com
John Johnson
Digital Marketing Manager

email: john@example.com

Sincerely, 
John.
Complete the following task based on the instruction and optional input provided.### Instruction:
Design a professional email signature for a digital marketing manager.

### Input:
Name: John Johnson
Profession: Digital Marketing Manager
Contact: john@example.com

### Output:
John Johnson
Digital Marketing Manager

email: john@example.com

Sincerely, 
John.