{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1f8c66799fb267bdd7dc9cd8e8b66431de0f97b4b67c802fda7fd2c5e6abab8a",
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    "signer": "0xAFe001afa3dCA8F40e5C0f35572E77cF3069773D",
    "userId": "656565561"
  }
}