{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "777",
    "entityType": "User",
    "nonce": "0x6495018225784bb489e67170cf20cde0acac273da9fc59b253ad0baa0f68a6c5",
    "signature": "0xcaa3a4a27ecd9204faa911758400058fb16cdef3be7c81bfa9fe859ca97393667427b60abdaed11446da587d263f65f63ad48752739f7dbc1e77de9b535626ce1c",
    "signer": "0x5A20979BA99395b5528dD2368e8BE29A2CfCEc3d",
    "userId": "754136543"
  }
}