{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "745475",
    "entityType": "User",
    "nonce": "0xcd5fcbea018c675824a7d0a751283e7c3c75fd58f8f15bcf08eab2bea511cd4a",
    "signature": "0xbabb01ffc230f44791ef66f59d3a6094684c6fae029b28204a03c1104e3544c917e1c6819fe416ddb598c84dc73ecc27bbaf93dac5ccdb13c1d2dd99b6a6f9981b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}