{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xe55140ac64ca7737d331a16b1e490c0c508de6ad75dec82aa6f3d608996698a4",
    "signature": "0x07cba311b88374dd3a8df3044bb3a6356e85bb38e79982299cfd5719c25ebb9e7df6d84a238788987d0af29fc7e5a96209b93d3513542f28e9a8b2cf0bbabd021c",
    "signer": "0x54C4Ca69528DB72E771432D2Cd644208d9a3C9de",
    "userId": "490408969"
  }
}