{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "64159186",
    "entityType": "User",
    "nonce": "0x2801ca4aa18605a1ead4d8702aa72a56169c903ae6a9f54cb0dd4c4943f5eaa6",
    "signature": "0xa377056cde16e6e1283ec2cf7c06ab0ebf76eaee6d36fad005a5b6919c2b4b152bef33ee0ed64f14be9b5ab8953a31d8aa35ee379b7fefdcfcf34052a071493d1b",
    "signer": "0x9389EeeadB96012E95139B302a0B50BF7fD75D55",
    "userId": "421654712"
  }
}