{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "688414585",
    "entityType": "User",
    "nonce": "0xec2a1bb9e6b91b09c8a8940871149a36495690579eb6eaffd56b2a5fb0a52b64",
    "signature": "0x19ea5c1a00a1b0968bf701e1aa865d102609ec0de6e437ddda2a255af73dbfcf53719f70b9954a62b2456f382e0bdf42be4cb019f48e80617ebd7a5410e1b5531c",
    "signer": "0x64B0DA55A684D51d3EF114Fe644eac7db132fDb7",
    "userId": "121304325"
  }
}