{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb1d7a11a41886fb666d334583e2be0a386419455c63979141a327bfcbd6117bc",
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    "signer": "0xf1b266FaB316100908263c082e562a5B847A0384",
    "userId": "575269234"
  }
}