{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb8c4fb5e1653dcef6324f3e985ccfe6bb165fcb8c8a7e6cb07c4c53e443b419f",
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    "signer": "0x6dD74f6D783f802B225b9224084e3BDE9909b6b1",
    "userId": "542424297"
  }
}