{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4831ef3379f8c618ac7c137f0c7a5dd86b9469639ac2decf2d86162809fc9f82",
    "signature": "0x0665566c56d50b710369091b1c7e4852af7553fee1bb08406b5653d2c49281db144fe6eb9e5ef8f1797b2dc66d0c1a24a261ba684db4bd8820ece3180f6adf0a1b",
    "signer": "0x7D5Ca1488d693753630b505Ea4CedbC71C6192eF",
    "userId": "893153463"
  }
}