{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "643532828",
    "entityType": "User",
    "nonce": "0x79b920c384faa1a903b0a972b2e15cc4fc9f972b73ce3f7f1b3a187b53c492bb",
    "signature": "0xeeea26801762601e3bbb31a546caac772a6832127003cd9c1a498ecfa115b7b2602719955ab28dd632a0757f1cb03fec9eae17f28ea4db060182da089e9884ea1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}