{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6f26ae265a13408d39bd6093fc94bfac2117a12770876ac785f147d84d953057",
    "signature": "0x5bdec4abc7bb6124aafb0c9cf453c77df4dde6c4ba4e439e295afa1afec97645037566d67a26355b6a3f19ba77eecac331d5ef3df800ce2a33c677f4942a7e811c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}