{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0de8000998d09885c96e91a4fbc53b0a9d28135c8f562b57994f770b9e00db09",
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    "signer": "0xc6Ad7F06811d6A88C31184481367Ea3716C9EDeF",
    "userId": "600661494"
  }
}