{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x22f14b08537a5511df91a4c5f5620cdc34412dbdd22fd04db263a54f594646e2",
    "signature": "0xbf702328642f718e0e1b7eff58b7d357565256bbaee845a43624817d990354806ceedbb28032b4cc459f338da628eaecfb94f1cce75d1d8a2fe00a647648bcce1c",
    "signer": "0x8C7bee798c0AB93Df67Cd00879d67b02274644CF",
    "userId": "855403"
  }
}