{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0f8cbf397b422193e5b83de6ff94555f145850aaa7de16e11fd61a609652c4e6",
    "signature": "0x1d88c293bb936e7ffb52f7d8f76986b99e7d6b93f759fe42f3bd9ff72f4f24e5314bc975b7c4594032ff8ea9d84ac60b9a85dd4ecbc0f4f93d54ef71357dae701c",
    "signer": "0x49ea1963bD0698Ba4421742478714fbFa38E0719",
    "userId": "189995856"
  }
}