{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2a6869d17af707a2d09cd5b7d40637e2d5b106c08bc720f416e67038c33328ad",
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    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
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}