{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x51756c50a24dc7238256c3e5aa68a86620949425c5ebe55df54d418b9d4922c8",
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    "signer": "0xe3CB71b751f74f3D722bD4380d6Eed12dF2c7289",
    "userId": "744806110"
  }
}