{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x62fd74eb3129dc3ada84a2a3421987ab03993c97d504f1d12f76605e28ff77e2",
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    "signer": "0xd72E9643619f34f48f752ce1b590024878642830",
    "userId": "571151335"
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}