{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x273860fef1cb91c40e2e557d9491a09d95d38b35bb298383e4e13a8f34f1a967",
    "signature": "0xbbd49ef6c7bd72ca86e58c8d8b2f6edc6f1c18afdcf7167a97b4bea1585f650b63e490ca90173b242f75a5eeaf8a738030fae6985bcf5ff4eab301ac8d66f0f31c",
    "signer": "0x54952826c1896F8D9f5336260a6Dc5066ab1b741",
    "userId": "847497610"
  }
}