{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6b6680fa5b1fe9cc0a9c22199987948424eb284f623bb673f9ade14e3e72b84f",
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    "signer": "0x08738da5C57ffe911B02Cc9ccA65A56d50c38F55",
    "userId": "421075373"
  }
}