{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x09b81fe9cfe674d401076dbfa4380680f50675e040d8cc4d8a859e29e03d025b",
    "signature": "0x06c28cd5288f54291212f8e90ccb0a58178e5574780b4a40e474480f64e682e509a7ef30b9cebb13d3b8465ea4361fd5d4b82ecbcdc8c30eaba265eab8245aae1c",
    "signer": "0x1EF803Ce2d7502B22176E665C40BeCdD92f49f49",
    "userId": "677195430"
  }
}