{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa57c7cbe96e7c3ea1ad5a14d3adeec72f2a63b45d9b6352931e4e4e4fb9a0c97",
    "signature": "0x9734f8924acbeb374db13eb465773bd307459e2722f803564fb42e283f2b88d27ca25c7427715ce99a259a736a86acede17c8c7403a7d5ef4d5282c31ea6e00d1b",
    "signer": "0x3bAa3e70C456E4B4392FBfb0474cF8EC46fEcaE3",
    "userId": "281406791"
  }
}