{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "539537193",
    "entityType": "User",
    "nonce": "0x9aa8e66aee7bc697572d4a5967119e491d3894af8372343fa9377b97cbd53fbc",
    "signature": "0xc3f75af0b38de22f2cd01e153a4d7e24f89aa7bb18f3ff7b84524211cdf4d754307b1e0be4cb472c39616589eff69086dab28e13eb001e46644fd9a7b4de3b131c",
    "signer": "0x8d9D00A94c3B1C9992e3CA4386AbBC6345B2E876",
    "userId": "396658415"
  }
}