{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x76245e75c178795227919cad0b83614f3d5111a8b5f97dafa88197edffe798be",
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    "signer": "0x3dDBeAd91820586505dAC3132608EDcdaCc58265",
    "userId": "144128494"
  }
}