{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "991417453",
    "entityType": "User",
    "nonce": "0x1191bc20ddbaf9bc7eb3e88cc56fbd5f176c8bcc2b78c3f14036b8bf386acd44",
    "signature": "0xbd5f9466062c0845d548ddbff862f05f65c29dcb393a8b6e623192e7887c2b94627760ba2e8175fa219997e298f463a314fe96643066f65d3c6c33f81793fa8b1b",
    "signer": "0x1874B7817bcc33522bD9D33b6cb197A1Ed939E51",
    "userId": "235421"
  }
}