{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "421",
    "entityType": "User",
    "nonce": "0xf4d7a9b5bbfbd62314b81ffaaa4ac35e7a74d471530a98603fc68b342f78cdbf",
    "signature": "0xb99b535ee5a6a8efb6e4ab50a3fcdc6c65854fcfbb87b04b2d58299c34fcef4039339d99262838ce4e90b63d085ade8715a41a46bb1f1795cf7da617f552fb2a1b",
    "signer": "0x3CEbf9bfE1b24355cBC348701860d601E226Dfbb",
    "userId": "172240066"
  }
}