{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf06b09a402ec70d312c530208506239c0e44d81aee3df7db38d94f3962e8e8eb",
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    "signer": "0x3FA7F2Ab3B4CE7482C7A14fa8f2d9a056f6C192B",
    "userId": "383215156"
  }
}