{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "303",
    "entityType": "User",
    "nonce": "0x82e11b3f1f250f3f0b2089bfe08caa245d936434cfe605d4ea36aa36351c4f65",
    "signature": "0x2b3a70ab254f646b69ece1444c43fb1ed51df547ea4a56362b9bf9f5db3bfe102c12346b9404edbf1d8bb80372484652280b3c0de5ac5e2b8ad23afd16c408211c",
    "signer": "0xe3921B88207E6D5BF6f86f1245645Cf17A2BE8c4",
    "userId": "472933117"
  }
}