{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4950aa2cbdd9093e604dddf49baae3b640bcc4b1ac347aba2de9f7f5ea0f6d60",
    "signature": "0x2e7721406f73fc7fc8afe7765df515d4353fefc709a5ce34d360f73a69478e1113ce35cc7d78baac59b1e0b52c049614e5436c28bfabd6832ca1c1401978d4271b",
    "signer": "0x3426bd579312f659D6f4b84192239e083B5DD2B3",
    "userId": "614854791"
  }
}