{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "354908",
    "entityType": "User",
    "nonce": "0xc638baf74a3ba3bebe47a15d6cd778178dfa523a890081338eff7d8a8ec5119a",
    "signature": "0xb538146e9f445fdc5e0139ee553d4a2e18d65e5d5bf4a710c59aa6ccff78509d4523ebc88db6a337a4eec3cd658ce2a0ec7f55bd0e7b1ef03161de40815bbcc81b",
    "signer": "0x5f669126A64334710E37f472BfBfE0D8cF408577",
    "userId": "171892"
  }
}