{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "73877",
    "entityType": "User",
    "nonce": "0x9853294bbe4919f2e683fc1530657f8c98509f125536472cdced975e45085c76",
    "signature": "0x318e86411e0713be0c7a4d988a85083d6e9440a5a62c62ba1ae3d194d6185eea38ce7dd7d81778bc03cd02b11fff0f4ad2987b47d1d5f5c907025eba818a1b4c1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}