{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1881189",
    "entityType": "User",
    "nonce": "0x16fccc9394cf9792c88f5be6134798e6bc96be24cf6aede4d1b3e3b7592f18fa",
    "signature": "0x58eea4ecfa07e5d73537bcfa63a3a5998ac3e2f181fee1bfc38cd0eea385ada177b65ab90d5ed25a002e363c5bb7b7b46d9fd9f341528d93b9aa77f44e8d98311c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}