{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x481de164c5b37eec902a47feb39fa9cc5189f9deb295c1f39db7cb94dc4c6f84",
    "signature": "0x99c2bcdd8454379aff9e72038ac051ded6c8654a446c523d2cd5f7c0c52a976f16a68d31e4e5f02338264d1f3b0571f3e88116e485f4eb0b7a663b00d4d2a6501c",
    "signer": "0x8Ece451d150139b6066e32CEb26DaE4076da0293",
    "userId": "260942771"
  }
}