{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7ee163ee3745d7acc233793f3447c7c1aeee67837934979b2f4f1bafe8e17731",
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    "signer": "0xe2c88842b0566d0d863E8147E7BE6EA260224Bc2",
    "userId": "107422769"
  }
}