{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "621439",
    "entityType": "User",
    "nonce": "0x3557f93512c08d74e3789fa4b5f621934de86a5c57e695bbe3372eb0e0b0bbc4",
    "signature": "0xe08e23e056cd5b55f1fd0194e2ddaa175f57ae20a12c042aac1c14fbcba834eb0229a1d7e6d65cee6c0905b2e318e5dd58413d09119c6a24ee98cc3e1b434fda1b",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}