{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50625",
    "entityType": "User",
    "nonce": "0x75774be11bfd1e799fb87e5e73f9f6c817676e667fecc340cda14932dd53b6c9",
    "signature": "0x4147aac87c749c02e87d9ac65f6b48db0c892c46c362cf39929cdd4f57de59b54f35e2c6f942984c90c143f4e2002b4b2ae8c51c1f7314cdceae0b15131b2b771b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}