{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x58869cf40df5cba3b10cafc2292466be8119a6c3bee10bc24e694929b8fa6d8f",
    "signature": "0x1f94108ccfdbdaad0b97ad4b261e2521bea1746cb5ca58b9c2310fdae7bda84835052be09611dc9a788d4776316c378910e85dc02e891beba3dc0bc18f65a7741b",
    "signer": "0x1C91270aF9483550C16389c0d10F0a9e72fAA407",
    "userId": "451779920"
  }
}