{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3ef6ecfe808ec95c2a458d723cc9c41f40841369a127573c1aa8a6af94fa994d",
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    "signer": "0xbb8aEED2fc959D83A88CC32Ea637BfF46778037F",
    "userId": "107999417"
  }
}