{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "322088318",
    "entityType": "User",
    "nonce": "0xda519b6bd0b9e632f71889c65815b38dd839933574c55517ff781d0fa2f27ff9",
    "signature": "0x45b410f341e1847e44abb464c4685c838aea70f5da3425e7675c73bf740513a22a7c1d0e2210caa4ae78b98fe23cb2d14007f88ecf539e10194fa4abc31e8ded1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}