{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "454366411",
    "entityType": "User",
    "nonce": "0x2a7ca917cc554c66f16e7839dd9b1548cac45f0f33c63e29d79f20470d024022",
    "signature": "0x5da8e5a8012f9f7e43756240e3cf2c5d6cef37b5028e0fa489ec5918bab45e7e3a20af2733f2370ffe9b7c5b7aeae44427364bb455b7fab5417702090e5417761b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}