{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "624603604",
    "entityType": "User",
    "nonce": "0xffb529bee31737e4559f90a68819aa3ac29a219c42447d39529b7cff6f65643a",
    "signature": "0x7ca7c30c538da323b3620166be04651a45d06e7a5a7d0d5d83768ac4d93fc1b27aab8bf924d0c15745194fc3b0c169cbe7e2acc39a0e4b1e3dcd4ad259a4827b1c",
    "signer": "0x4E3828bc809fb5B9deb81fa536cF73Dd5bF4eeB2",
    "userId": "185184169"
  }
}