{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6e1d52c94a23c67324e81d4cce73d224036f347f89c5f27a4331180d9913d592",
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    "signer": "0xE6B24340f3279D03154F1f83D702FD1Bfa2351f0",
    "userId": "507413880"
  }
}