{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x649ade848e1dcbe8b4405a472387f3d69c9045806a946d42e6b0d230f6df51be",
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    "signer": "0x7a5964d01a0E6003340532Fab87a5Cc95d891dCf",
    "userId": "653556831"
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}