{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3e98757b2fe40a663278f5c00e9ce345b657d6715f835b3cf90102d6e08bad61",
    "signature": "0x2471a5c3be1e1508c4bc7a954b71db14a876b48248fa358cf8e028e70ea2586b508a779b33ae176d748a1bf88a5d0290e2f173cb5202451e36202d4e517c42991b",
    "signer": "0xa568e0f808c5B9E7C3aBf719dfA04751be8A94CD",
    "userId": "545790265"
  }
}