{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x92ff64718cd82d7ff2ff99fa19c8a29bebadd87140438eb03f0cb85d25d598b0",
    "signature": "0xd8a43a40bba3f78ec2078fc0c13fb12367eb62671c6c636c58448e0f19a3757f6a99a1f5ea6f8211cbe63f84ae129973ff80620abe175b0fa774fc4e59ea9d781b",
    "signer": "0x2F3A59Cb9A2ddd9d503bD98D3bFB3043e587B250",
    "userId": "671221196"
  }
}