{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x294ed9ead0c3a0efca03558b494b689dcbf7df405c1e29363a9b05f814e913f5",
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    "signer": "0xF1FA1D22B85b200516Fcc7f4b56d14d9F7112dae",
    "userId": "100549961"
  }
}