{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "624603604",
    "entityType": "User",
    "nonce": "0xe59712e74fcf755e1b8490f192d8ae59a610d5ab10e1dba19cde89965ba158d1",
    "signature": "0xc5285c48902f60fe018e81d51fd2caed26d85f5351ac29f6f282a288235a849f1a782959dcc3e801a9b45bac5b734a24c6e498b6f44f9532e92a7f2fc4e0a4da1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}