{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd2426a456c81072387c2bc7d6270fd487c72a50b73f1b6b7ee47539e95bf4615",
    "signature": "0x441f62d7451406eadc760aa0ab3b9ce1bdf992de7a34a28e70ad8112c6a569c953d97f4a64c21c20257ac24f6bdb10a955baab8e52435c647a2da8ceb00ad4ca1b",
    "signer": "0xA98d1463460E210dE5df0248b43C822350CfF9Db",
    "userId": "622238879"
  }
}