{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xace1163564ba95e17cffed7f15979881c96c696b4630ff2d49a0735e2ebc431c",
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    "signer": "0xa738EEE0069867D724b136d8DFc260e3f505EDad",
    "userId": "337739637"
  }
}