{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc601c89bd3fa0ddbc7b9a94ade60dae4dd04bc20988cd347f36de2fe27d1082e",
    "signature": "0x3da78eb3a8ef6a8422443e456d10141341573debf93c70d76142be50c8c6c3cc323ec25a690d821c55953cd1ad0f7521a99fbb301e2c8e257c19e661155399c11c",
    "signer": "0x2a3E0B63f0436fa9Fea56951BC05Cf172984a146",
    "userId": "630554949"
  }
}