{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xac79797c2eafb57cc072b5d282f9d718584c38ea6034d3062e4ca30ad226fd13",
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    "signer": "0xdb3Ce61d44D9e0d07fd2c96c9d3eEfe4ff9d1DFc",
    "userId": "378891044"
  }
}