{
  "manageEntity": {
    "action": "Save",
    "entityId": "1399499253",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2d0c416fbca7e1fa50c14d5a38d388c29e8a402a5900fa67cad2b7d99f0cccd6",
    "signature": "0xaa91fff67ad37625f575f801702f085730ec70ecf2bb8f904ada00fe4f38f31d12cd028883429bb528cfb8c150e6c73bd82faf7d3ab090162b87577753b9dd8f1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
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  }
}