{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe6c4cb4d0f1b13600914870f4acdfac7d34c67377f4040965417009b418c0e5c",
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    "signer": "0xE31D679e937c708b244Bc91B30fd601EB0540Ae5",
    "userId": "223959497"
  }
}