{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2c34338054e06509a7c819eee09d0655b84cf28a975492729ab1020ba4994d37",
    "signature": "0x1e51c2e79d15bd3793c84979deec73646dc4816e06ac0fe964711530bd2f6ae315e93241827ca458c08a3feb77baef00a388e808b1147c8d500f3fc0517632c71b",
    "signer": "0x8FD6b4a8e927FD20f850aE4319D3b4005B1D9eA9",
    "userId": "636763468"
  }
}