{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdb12e2bce07efcdf2545697f3a4913839d2cb75f37bea7d22683d4ac5f9b381b",
    "signature": "0x4b8fe84389887bc8a2cf0f089ce9a81c73847debe2e9203938341e2b7b8e52be37fc7ee46fe92b3fdf2297facb74ca3882a3de5b16ea6b477191ecb02339512a1b",
    "signer": "0x9c96F453Bec352b9fB7c25692d528492289601C1",
    "userId": "13351015"
  }
}