{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x382fa2e87807a5260d24fc66073491aa0590688b178017767231e92918473062",
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    "signer": "0xE1Edd5A0ADcc2Ba5B73E968e3c6ceD8290B27a0C",
    "userId": "664083814"
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}