{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x304a2b77e3ba6771b8c2ea303033bd5942524a216b62169e0c8d380bb6815418",
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    "signer": "0x8f77F7FE2165fBa864E751474Ad844d93fAAFaD7",
    "userId": "265585009"
  }
}