{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51978829",
    "entityType": "User",
    "nonce": "0x6f54d08e13ab93dbf1b1806ca0e3bd6d84d8b1aa980471513ccd6653646501c2",
    "signature": "0x9e841ca89388f36a1e9ecb3db19ba7ddd0bbb2bbe40575d5799a2aca73609d3b719d2b1340c2ed5a0b4f89ccfd2bbed2715b4463d7d4e132ff46789af9cc5db21b",
    "signer": "0xc3e03c21664729d32A8E77189667f4cC5091E233",
    "userId": "498109"
  }
}