{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0d65ef43681c2462d9a67ef61d8adc6805b9ab6c00e6532e1fe5f5222064defc",
    "signature": "0x8d4e547499ae39359235838c7b9d6101413b543adc3775d9e5bcd3ab3e3b7fb4750f9d7ba556a7783cf31b7325bdf833d98954dfa268e06cb978ae8f064603ca1b",
    "signer": "0xaF7e1E037FC865Cf0F8b693008900402789b4138",
    "userId": "542937414"
  }
}