{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x038ced7c478102c0384101cb7692175990dcfe6a8a3322eaaab105d50085ff36",
    "signature": "0xc2ec391858d5dc67bd3cb32eb991bd0b9420efd9de3ea43d386c40ae63689d242e94ca25c3222b0dd6a0c981107e4da6d29f88b97d277278b162e059aeabd6a91c",
    "signer": "0x70E0F709F3D3c87B82448f091510DB972Ab39052",
    "userId": "911885575"
  }
}