{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf4e435365ec4d29aad72cb67e515fe0767b15f17525e49a1ac0e10dc79dbc167",
    "signature": "0x714827beb8ec57251dfe4b6f7aa9a8e53087eb83388d8d8d087c2dc15e75ddba1b0c288c24e9f547e3806b2f4a609b9e98418792a5414526f96aa16a90662d7c1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}