{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "645729610",
    "entityType": "User",
    "nonce": "0xb8fa4292471d662898e873ec571f85ff681ed3721c6e27fbe32366630a88bdf7",
    "signature": "0xe685c97e22e7da460fdb13fbbbde5eaf9540145488849d1e892f94fc834ca3a6723c83174b583654f9ee379de9b6fc77feefe75faeec72fa7db970b3f690042c1c",
    "signer": "0x580b8ce3181CecdE24dda8DddDB6a57828990d63",
    "userId": "214104220"
  }
}