{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0f2defbc22ed29998c2b1076c25c47af158aab31b62665945de8711a11efe0e2",
    "signature": "0xfa0df79e9f29875e0db54e63c23342f046eff8b995dc9b9f6fbf223fe686a4fc32d6721229bac1fa4d60e9c0ad9e3f4ba1dea58809e506ba7c4be9e43a8cc66c1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}