{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x224c559a6a27db47826589196728762412b85514a3d0b3753e533a599d41445a",
    "signature": "0x588c4e150b43879e04b55657b6f2b3a65c7147f86a83107b98cf1daa8727a3ab30fe0708886beeb343e0e465ba0341972e70401416c6e6c2af2e2884bc77e7e61b",
    "signer": "0xf1b266FaB316100908263c082e562a5B847A0384",
    "userId": "575269234"
  }
}