{
  "manageEntity": {
    "action": "Save",
    "entityId": "53566",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x96d91765497b6b24681de87f7de9fc48684be6b59c3dd54aa5f9e6fa9d1e61e1",
    "signature": "0xc42e3a9f9cbe4857e3f2b29c786ffdb9503f09e13355dc4e53d4759730c7041a53c8d6098aa23bc27a06a28d16fbdadf19a05e6e9de065d7723a9378af8f91011c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}