{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4ea8807d971aa782393984aa14cd10bf35a13ed9e4c2946f653d896dee46761a",
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    "signer": "0xe73dEC83fb1FFbb74b846Ebe43FD299DFb3371E1",
    "userId": "225142146"
  }
}