{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3014dcd1198d4a8112acc658471791c07da098cded735cbbfce71b3a12b14044",
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    "signer": "0x13c7b96e121a63c71cb2eE602EB49657F68c22c1",
    "userId": "374868101"
  }
}