{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x396e671ab4681d5ec97690bf422dd79675ad05a05e44ae67ee05f84bec6e7e91",
    "signature": "0x4fcdd75119365c22f953d1c80e17da81868a6e1fe21e33aef47dc0d9f6361f8d391ac28ef5719ee810e12c1594b33956b1af046eb4b369d270f5ba32637f08bf1c",
    "signer": "0x5CaC6A992c44d0E8eCF564AC4049b11c942EB158",
    "userId": "426885522"
  }
}