{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4e455897ab46939b3b67e4c5fe0b91c7f6d4e41868c9d1a3814fe51af2ab758a",
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    "signer": "0x09B272A00c21FcBced8F768468e39b2de1081C1c",
    "userId": "575254579"
  }
}