{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5e1b3fdd92db9be057ad08052d4c5f415d0a2677f2a90446ed2e569a8ef58a01",
    "signature": "0xde0fbaeee13a60a06a3fd90c0adeff7ff8659ee5a028d9abd1d57053c3667dca21d4c2812c1a44a33c31149ea1d381065f432eb7cd902ae87feb037e994512b11c",
    "signer": "0x8c5473b865B82a2EbAb23745ffe03CA73600768f",
    "userId": "561254107"
  }
}