{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "689751511",
    "entityType": "User",
    "nonce": "0x91b87da6fdcfc64e9bb648df8559a580c15f7b43952a364090fc4ae4b09fd0c2",
    "signature": "0x591e056fcfa8341f2d6188f4d2c370d961b1b83ed263b93213f5b3d499e669366b88f286fefd748323cf7cee46f78051aa4ee80165156b2714113ca298ca5e3c1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}