{
  "manageEntity": {
    "action": "Save",
    "entityId": "974733108",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x440c78a296638498ed7ce3dfef9034f7975065e69f3167bb854994544307a36a",
    "signature": "0x2b43b4cd5462c8ec2a716e723375db161bab87ff1b677662d7501275692a962710be7c8e33b47d689c1356a777094a6cf581a8116c6dc477a5725dd33aae2d921b",
    "signer": "0x117E69e3F78aD40032800269F74A2Df0B3c36548",
    "userId": "180490275"
  }
}