{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301356667",
    "entityType": "User",
    "nonce": "0xb0e60b900dd51d8fa31ef718be79dfd9fb0b22f5e4a99ddb4d30fcbcaa9a948a",
    "signature": "0x8d2fdedd797e2e10ae150c06eaa20897afc0526787f12aaa6064879ab6ab12770778368b63f61afdaf9c0dbb375680fd3060e2fdb2475df53ce025f48523aaa11b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}