{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "506789556",
    "entityType": "User",
    "nonce": "0x3d1aed1a848909302fa39aec42d25c8049c980f66dedca157d4695e24ba8867b",
    "signature": "0xbbe1ef006b33c25d8348aaf9b0d2502b2da410ec8310490c1f6eefdcf318ffc174e1acc5f56a4c2aaf173d3678ba35094a65b6897c59efd76c22ea7a601d92a11b",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}