{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x153a805c42f6aa9039e2f57fb02872ee33a35b971260759c71f38bcd35557492",
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    "signer": "0x0270E7cEc81bAE1fC92D46090cA8E981d5691aCE",
    "userId": "538676799"
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}