{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0xe709d544c225a07e1d5cfafb7d609fc4e3d3b65a4f0b9c4ce7fefb75cd01fe7f",
    "signature": "0xd9efca1e1c655da851b1419b7540f1e047f3b410723a3ed8baffad47cbbf7cbd5222da52c32cdb37abaaf4755e8c3c4760a6d807d5f66757b003fb5c8dd3dfec1b",
    "signer": "0x108D612Ab8b098Fb5c1CCFc861D8531e2abE93Ca",
    "userId": "908696475"
  }
}