{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe45628adfd0325ff398095f6239dd9d006b5b7f832108cc964a11744c4c38543",
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    "signer": "0xd22a057BD42992d379e97B312d868d907D7335AF",
    "userId": "457613220"
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}