{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1257f8bead9b03e25c2991767338b19ec11a62ab4efa99765582093a2e5374ef",
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    "signer": "0x91c65041da5a7afC1376dEeA5E1F8c9Bb5B0c0F2",
    "userId": "92589390"
  }
}