{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x8efb13435a777f9f268c16d369b09bc48821c4acb635508ce3a5b5d1a26b2d6f",
    "signature": "0x3b9326b3e0857fa9e2594abff2cfde7f56f7cda4cc237d076a1085045078ea8f06df3a501534ec0e9971c6175b44a6b76db8bd5263e9ae782031f0fac7d594021b",
    "signer": "0x9698A898Ed554B831a7BB69972E1B05eCC560430",
    "userId": "967510490"
  }
}