{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "987199883",
    "entityType": "User",
    "nonce": "0x04ec35d75491f2113ee128363b05f1093cb28ed0869953d6d03a90bff979719b",
    "signature": "0x51bc6619f41a6f8e57445a206455445a1fc7ec71ab2234c59fab23c1d42f30436c75a9454cf78e05d6c35ef149b77df47c0f9f2034184b9cb48561795e2e46d51c",
    "signer": "0xD4D0507E1111FFF6D30D7F7914D03Fe8F773326f",
    "userId": "310671443"
  }
}