{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "999548897",
    "entityType": "User",
    "nonce": "0x7950f4ebe157830a60c7444a489151c3d00b8a1b840f3f915a0bb24d8eb3c3b4",
    "signature": "0x7dc83431bfc0bad0b369d3d877c6dc2a0400593fb8a230090fdb4a2e0ea72c754a1e893a196e022bb27ae484b53c43ec6e9cd208d8a0960f10c543fc70bfd6f01c",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}