{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd50c51c974b5602ecf9e9785c20cf95233fd9d3b348bcf7de05b863e82b15c7c",
    "signature": "0x1d0131dbeb57fbc727a96dd85ec4af11d7293e8018205b6cb0f62e222703c90a0be2c10b443648eb9c58afa51d0859af579520ae9449410b1794dc22083e28a71c",
    "signer": "0x4086Dda2D91F77cd46De0859a4de37F888508faA",
    "userId": "568518925"
  }
}