{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "521882155",
    "entityType": "User",
    "nonce": "0xb6574e207c227f10a77037e5c25df7b8c742c50df99664bac58996103b8d4f9d",
    "signature": "0xa930c2fef95d742471d6decd0866849d635ef7ca656624904c7b84a2de2e76fb6abe892fbfd5956c380b6e3ba9038ad141d8be6e3f31a7ea45dae9a779dfb9f51c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}