{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb592800c015edb303ef8233f2ee5356b0f5ae21b4e6e66c116baf86c8c803320",
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    "signer": "0xBDDde19d5BE3a6Df0526390AD52e4ab9301d86Ca",
    "userId": "551647418"
  }
}