{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xac823199a9e3eb1de3ea355d350ded80ef48e9b5b7e8d1bbd88929acb26aa384",
    "signature": "0x0c1eb6dc225edb92da456c2b7fad372262f0e624bd53f31ab783fb6944e868be1336dbb6f2935d7d0ce40e5024e27c5712656bedc9f9a813a378557b78508be01b",
    "signer": "0x7a75a4f6Db403e120768B73C5e7dA9BD6eF0306E",
    "userId": "547641018"
  }
}