{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6d8f0c6f799ad21404c8b10827086cc85d8a1873770300d55e33e28525beb4e1",
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    "signer": "0xeFd7cAFe4638a5f68E7eACA3C7eA2DD6Aba6Ad56",
    "userId": "881096998"
  }
}