{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xda8ca83f1bf332db29c039dd5a8b1ddfedb605b10aa544d4b64e6474aa1e44c4",
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    "signer": "0x5E60F6689395b705fc123728Ef210cf8c083De2B",
    "userId": "252241491"
  }
}