{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "708077815",
    "entityType": "User",
    "nonce": "0x3681ad4d4122ff97c7838ec6424b67dd30608445d43a73e3fc3c8e2ea342a375",
    "signature": "0x6590e6189b079063c0ec89da1d0539dbb533b230575e4375466da01becb9a61d799d514c23eec84c0b6074592a9c91b3774f3beb7347b7db2ff333a5cac76ff41b",
    "signer": "0x99FC58b9AbbC0C373045aaAE3Ca68Ac6e5b586f8",
    "userId": "590830414"
  }
}