{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x951ca1323b32a4bdd1bb149e4d2dd40b8d96066b0e3010c5de39970bf1eb4b9d",
    "signature": "0x8fa68052e5b22bf10e8882881cbf4834db8d8b0a63636346f975628c10a7d8fc482952bb83ea358222119c5680d0a491a7bce369b407e60ea40559f366af77191c",
    "signer": "0xaE46c3AEC218EC7Af3a2a4EecAa5d42502Dc32Bc",
    "userId": "419000210"
  }
}