All of these universal wall mount brackets listed on the page below are compatible with LG 49LJ510M 49" 4K LED Smart TVs. All Star Mounts carries various types of mounting bracket solutions such as flat (fixed position), tilting and articulating (full motion, pivot, swing).
LG 49LJ510M wall mount bracket requirements:
Fit VESA 300x300mm mounting holes on back of the TV
Support 23.4 lbs (weight without stand)
TV dimensions: 43.6" x 25.9" x 3.2"
Note: As always when attaching a bracket to the wall make sure that the structure attaching the wall plate to can handle the load being applied to it based on the wall mount style you choose to purchase.