{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x789c9c5e70d027083f758d235ab83191375273235cb39657f6b7f90ae477c613",
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    "signer": "0x84FafFbdCEC77B8fbE02c6ff72127fedAda2697D",
    "userId": "641538264"
  }
}