{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0d5f556b5c7a7e407d053f80158a0c9620459feb3f367ace9a00ea61bf5d4ee7",
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    "signer": "0xe01caE69fe6cf2Ae69eAD7eCDA86c3924330E50A",
    "userId": "406984433"
  }
}