{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x508f2cc7f7dc4e3cf2412ddb335265b500e493e1e38f808e3a597049fc2101c6",
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    "signer": "0xccf59c86d4eb0E2086aD416d97796fb5c3A6080f",
    "userId": "808982757"
  }
}