{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "412455619",
    "entityType": "User",
    "nonce": "0x6a6f39cac9260acd86ad667c01aa6aa3761db4da6f55f3974d867af7f4f53a99",
    "signature": "0xd954cc17e9d51d18c941ead0cbb7f0534b31bf3211cc41f28e823f272abaa1f83d912fc864283d89a28669b5527106af8ea195348f06411caf5e570d8b910ba11c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}