{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcf9689a4f5651b78bae6fd42e8370450df3435357f358fd07aca91684e5263fa",
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    "signer": "0x2B2Fa3917FfAD41AF5C5b240e4cbaE553dBb7d81",
    "userId": "836118450"
  }
}