{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "331839",
    "entityType": "User",
    "nonce": "0x45c4d3b1a714c1116268abe2a6ee52b6c292aa3cb56e123ba6f66e131a9f6e1c",
    "signature": "0x6d9e2b02d145ea1854ed58701d1307afbb3d104b814a9fbca8081007a17ff0331b4817b70f77c5e18579fd370c72df46c740409753a3effcf6f7b44c0e3caa751b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}