{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1648339",
    "entityType": "User",
    "nonce": "0x75db65442ff7e23f569fc7034a00aa7a64600c4f92546be62ecaec406ab6b1ec",
    "signature": "0x2d652a3eaf1c01c51682683b82a13d189fbbdfa45302fd6547680d431725d0a54f769b20714f1312aae10abf40c0a531c4ef772d216f924ba4c2129bc808575d1c",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}