{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa6e0d823fb01e464c4e89833e804d3f266bbf94d987757518feec50696260fd5",
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    "signer": "0xa0e74dFCE6fB03B08b3E1CbD8FcF35E9aA42fA19",
    "userId": "158522887"
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}