{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9ed0cbed663676c50f4a0c92d6a59d06e304fdd4187675c2fb03e0ded1e60c8a",
    "signature": "0x6c69cf7be4b5687e88518f2693d0d6c40f54702e7b706def86cdd5ff08a872575fa6025c0c45135fe99cf773d5298e0fad8f0bed2c20c00dd6416fe3ed45cad21b",
    "signer": "0x16Fc5464B0E17F28BeBA6e812F62352F947e99CE",
    "userId": "89908860"
  }
}