{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x90fb37910d415f16ae2d7ca2c51ba6d21fc128d131ba370dafe0a6c251328f3a",
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    "signer": "0xa4d4b5908db0673D68dDC17aFF8080b4f9ad7068",
    "userId": "833130481"
  }
}