{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x481175f01ade02f6bdf50218969244fc9519e6b4eefb2dadf7c581ccb63127c0",
    "signature": "0xa48e79ea2ea05b9406518e6ab3dd49cb0928c9de423fc6221502470f9f208857608dcff628af937b5bad48d360207a1afcb1b093b66ca227dc09994b9c68053e1b",
    "signer": "0x020ff5cAB4200108e5ac8E0fd6c008E0a2dd7636",
    "userId": "54497799"
  }
}