{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x00981cb6f8a4da0bc56f481b58aafb12b39b67cc438cd9aab62a64e5fd8608d2",
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    "signer": "0xEFA5862656812D54928c0E06C9a83EE687AA63f8",
    "userId": "974988825"
  }
}