{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x70e074160b23249fcc9ac1a71814feb439cd3a3904b82f291938bbbaa829df89",
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    "signer": "0x9a0fce0dD988cf6e406875F1Dd1cFDE377959EBA",
    "userId": "620773123"
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}