{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "354815",
    "entityType": "User",
    "nonce": "0xa23b82322ca16293e608e54f0fbb67ac29f74bf25be1ca5b5bb9c2d5a9cc02ad",
    "signature": "0x9f9eea8431aacb9fe0451edb7694a9908f158971beea1dfe7c2f3670577ea70e61156b1e3c63441b5d5ecc322669503b3fb8659e326f83088e62543454b7da2c1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}