{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "587300501",
    "entityType": "User",
    "nonce": "0xd54cefca1396b79ba1becb409f029f49d265356144933eaf887d0e4a014c2ef0",
    "signature": "0x70d5ab46198020670cb28cd5d5ebb82272c49688f1051033bbcdbb84feba746465fe1e523b0a8bb7891c050956e4cc5b057eaafae471f31a05bf02916e7289b11b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}