{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe6c0df4a129930b58ad0448cfc799808d0106ec9dbdbcdfe2034710f82da8961",
    "signature": "0x31fb50fac889ff1c4892fa65c8b760be8d6d7537935150ba7f22ea67ce51c47d21124d904fbdba888dd8e9a2c00d8309e0e453d708d238db308c212865451ae41b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}