{
  "manageEntity": {
    "action": "Save",
    "entityId": "30281002",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd8bc44634d42211d8abd9db9d72fe7c08f73c4d50495ad305c8bb87cc978982d",
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    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}