{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "125737",
    "entityType": "User",
    "nonce": "0xa4a2852fb211a3d3a5f9a180d84c2e6950a89d77d4ad89df242001a7423c9922",
    "signature": "0x4e641e2286339058b9ca4c0fe391933ea3db3890071ec07663c520e8be52d4753ef35711d0923b606e7f85c06ac46c05598e8c7f600916b4883a11fe8ab437cd1c",
    "signer": "0x57Ad6E2E3fFc5ABe9b5FE7DC3bF7c07c8cCf9Ccf",
    "userId": "571702334"
  }
}