{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0x7cebf938375d8539d2e9c23a2eb208cf912f902477a90ac880b2923b867819e4",
    "signature": "0xddf85afa32876821b9e7415ada32680e3a2ff2307f1108455035e2d99199fb086e837b872bc8a4011a32143067bc6ceb66c6e788b9f8cb81726abbc10fd3f6ab1c",
    "signer": "0x73760064D08e854716c13081dE151D63b16b2Fb0",
    "userId": "646161559"
  }
}