{
  "manageEntity": {
    "action": "Save",
    "entityId": "1390604355",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9cca608433b5d9c64b465210d53527b6858c126bee5b609f1c01bec4e2633c1a",
    "signature": "0xbe1624ca8f98b9d16f14d8a53d857584b3d133d1581fa1bc67cd3a21467da36238e654318492952fbe3871b2ce91c0541e9cd7e58d36314501698f4a27ce3da41c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}