{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "346741915",
    "entityType": "User",
    "nonce": "0x53446f51fba90c5c80876ac81b4132b381bd71311951ebc42c515a59bf27463f",
    "signature": "0x6d0aac743d667bb577305e0479eb6ee96649950bcb7135dd401153d3654f556c3fb85313f2de05298b54c2bd52cffab680b354ede53ee2a268a090259cf236fd1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}