{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd1208998ce5270ba81facb1c9241f9fe920680f77609ebff2e88314b92786f8b",
    "signature": "0x77f3cb9b831c31c97153e10be9c96786c2ab8c1c025f9ed2932037a373121f6f1c1109cbfa507fc89469e44de6d5d86ac4091a9081d9c37c3f3d5f10879bea7f1c",
    "signer": "0x53f3EA8880a20AF3aC3130E1f5b4B948E9a97751",
    "userId": "274537344"
  }
}