{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "643532828",
    "entityType": "User",
    "nonce": "0xf534db46ea57fef3b11b293dd1cb9eaf90cf6961f401bcae50b8cdd5105b5768",
    "signature": "0x9239b1a3b228b319b8ad5f470ddfb9bb9bbe5a32438f1bd769cebf09314802b319db7e790b60612083a3bb2cb1fd44bfaced5c2dc6f7ad5c656487c2060d7b311c",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}