{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb74a90267f31901f37f3e6473c8b679ae9e502cde06cfe911fca0eb608389a61",
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    "signer": "0x8d6574D9c6BEB5a6d10A244E80784b0Ab94a7910",
    "userId": "282911244"
  }
}