{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf528cbc695f56adaa987c5e9fa3aac45c2d0a84cb35545d13ce4ede3d006a0c4",
    "signature": "0xf77be58fac3c1c87cb20c06f843aff7970fca13236387ab9cf0fdb77c2438f58711c1e313224c28b484b648e62dc465f23f88250e9b2b85a08c71540bb1815791c",
    "signer": "0xb9B88a80F1742b27AEAff7D480b7adeE3bdE5431",
    "userId": "650953402"
  }
}