{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "357918",
    "entityType": "User",
    "nonce": "0x3af87391b18a17c2138460dd9a320f35d0f00d7fe4dfa39ec3c912d1c746eb28",
    "signature": "0x7da1f49d42b8bf1799b5b2a410708adcdb570dbcc157557b1c2a62edb30236e30c32bc2a2b63fe9e6e9572dd7ce2abde08f183fc65a14fdd5dfc4062c00bf4eb1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}