{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "215993",
    "entityType": "User",
    "nonce": "0x550ade151c3cb2a08da3bb796886650e5369b78c4d3a336f08c0e36c9d339302",
    "signature": "0x0378155afb665ed21fc9362c152800236e1ff0e1f828b5292efe8853c76bdea62b1a7a4216da3b2f788fbae507dc9894c0e50dfe080e23dd4f7f9113fe3e46ed1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}