{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4237247992b2982541369210c3091fdfde12613024a7dff6e5634ea5189f246c",
    "signature": "0xcdd9aa676e15cffb352104a98542ad8fec03906d3dcb59863483ea8e688ae8cc0c976115b7121c0e93865a23c0eee8321011e6cdfa04cafc327b00c9ad57878b1c",
    "signer": "0x8E1ce6Aa9262adA38A31947BF007a8D8358113C7",
    "userId": "460428391"
  }
}