{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "270209897",
    "entityType": "User",
    "nonce": "0x9464b6178b57c8db34e6e412f48b12deb2dd879ed9df8bae48854a15ea37b43c",
    "signature": "0x224f749339d7dbc9090f7fac1dcd55a754bf2cee45f11e385fe81b944d0f0e0c6aadf13fac0475339690cb3adcc39a69b480edabbe2155429b37ae0eabddbd511c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}