{
  "manageEntity": {
    "action": "Save",
    "entityId": "513255298",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8178d3fffb4b7a59adc4d17436e6c639200ada95646ff52908829b380b1aa6f2",
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    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
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}