{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0xf814eee9f4b6c3f60c5c02a34d1cfc10f49b6860b039aa7a9ed5296e5cc6f491",
    "signature": "0xb1d47ead62b45b1207203858867131a90861fea2b592cc98f971109b8e5d2ba30bec532587ddf3fd47b25a0b77d8ca6bb5f51bb6203cc08bf782f7785bff68b51c",
    "signer": "0x8838cB510ADd37b71093e4FD76B81bdd280860f8",
    "userId": "674339889"
  }
}