{
  "manageEntity": {
    "action": "Save",
    "entityId": "1296843562",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2321583916ca868bfee79878b7073ba72cf3b6dc3ab0a0841a6e68b0383e0b72",
    "signature": "0xcaaa735d1f9492968f0e1141cfdfbf4643cd15506d06262f41da412a0d69560971e5ca0b20aff613250267ed82d8760f30e671987132e8e9032380b80a1c2e241c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}