{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x278a68877b4fc292fc5c75b727d14ee7760ca196f44bf509b12b72deede97410",
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    "signer": "0x3EA35e609478cB4F9e7203de8c4322b1272D3d9C",
    "userId": "631110780"
  }
}