{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa3a07207ef07ee17538db3255c2589728de5f4af27b30c9856ce8d84ea4fa72f",
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    "signer": "0x97A48CDe9eD5Ec07148c100551C5e772f2667403",
    "userId": "28372811"
  }
}