{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6b4eeb29612fcc5308760a111906bb41da993247d58973e26c0723a7b430d6de",
    "signature": "0x75c4d3ffa05568dea08e67c2f15ca39acb3f3ad740899da810df7e4995c3a1566cfc2745b384418fc5bb625c2417c5438b1086a2370fe4d01c218535c7181ee41c",
    "signer": "0x748ccCc8022091F8C1B32Ca32f2AeEeC66CaEbC4",
    "userId": "757509215"
  }
}