{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5a38de1ba2120d4a806dbd14f2d4293295df9087d417b0eefa98fa27d75d1573",
    "signature": "0x0a847ca461ca5f052f15a6eb1b5fae220d6cb4d926301c1c695d8f8523edde0137341475cbde76fdbc3c8259a7b04fd85b6121802a2267903dbde41b9c70f7c31c",
    "signer": "0x732b732EB90beB3dE512bE5E0C30694E00762e6D",
    "userId": "263579059"
  }
}