{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x9860205b1621b768baa0032f006c5de6ce7ed94c6c59c51c9ca1867a2df93f13",
    "signature": "0x7ba5aeb107606a50898ffcae731c878c068a3cc42f467b2cad61466135dc82f7620f2bd7671fc21be19e16e175696a914f28e3b0f79141516600066e91a631ee1b",
    "signer": "0xE61b4fA720A4327Fc15B349039A5518aa4F9f10B",
    "userId": "789953892"
  }
}