{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "575845728",
    "entityType": "User",
    "nonce": "0x4344777466f94f84118c51a4f91197dd852630375aae57d769d196921692352c",
    "signature": "0xfa3126e2e0dd4567a23be2f14cf1895e56b5851158e04d5181cbd5637dc3ac49191e1cd741717c868128aefc6e3a6187a4dc7faa4b73734fb660b491bf823a261b",
    "signer": "0xcc9cCc523005B394381478381D34DddB8558A28f",
    "userId": "957873025"
  }
}