{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121763",
    "entityType": "User",
    "nonce": "0xa78899f8aa3a292698548f3d17566938fa9268dacabf884614642b2b82863063",
    "signature": "0x5f9e045a46c1f6bdc713bea4bfd5d3807e2666d534d8395aeb4d9ec00ad2bccc73e76b30479990d641166ca0e36646c17af002295889cac9621d66020e5acd181c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}