{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9da225735188412e0c38820cf09d2de3b6858e65cca1fcf5205d762d73e01aee",
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    "signer": "0x709FD3e3ad08B3d3726132D2d40e0E6d92d91575",
    "userId": "25596281"
  }
}