{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3221e70f4dedbf9b403340689f0d2e5f9daadca40b5b80d70332d832b7b7ed55",
    "signature": "0x5cacc1b7377f7cfe831b14f3e0d1e16cf5c018fec2e59c86ec9bc050b0c630342e655830e299f378a63635c3e2a672f90729eb048a11c070ffbac2923004b0b71c",
    "signer": "0x2e9A7dF19A825c04705f3e3E32B1Fa34E81FEd8A",
    "userId": "813191556"
  }
}