{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "342990",
    "entityType": "User",
    "nonce": "0xd10d33e7e4de5f5302142adb42fec986f0b9412132b9b24e520edd2edf6065da",
    "signature": "0x5ef328278ac0969b15ab2e3ff675c2ccfa0d5b74a9a4edf80849247d0408f4a56a81da8bac2fbc1cf7c01d7cd7d7c974cdafa2a92c5918211d83483d6a30a4f91c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}