{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5cbb71696f87ecd250ef099a985f77b2317c0978865f128bc84061da1508ae3e",
    "signature": "0x0e9fb5bc6647a9ba8f2f2f311017d84c34df5e7be37e5db60465905a7527f8ec69b11ecff05e2c26da631840d0bc089a156ac52f02742aa9f4a0a83c2ebddb591c",
    "signer": "0xFE08731640B1Fa86b12a27122B9f3EC699F30aeC",
    "userId": "784099162"
  }
}