{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "875378857",
    "entityType": "User",
    "nonce": "0x53cb227b88a400622ef1dc27fc3c28b4660a8a432aaf4071cc8aa05dca5a634e",
    "signature": "0xc773b70f93c3a64b5c90ed640e531bee25815db661010facfef2da3fbcfecdd541d61a11b69002f2f69704f0a82087115a22ea3868187e9217c2941647fe07e11b",
    "signer": "0x94d1769762bc3a1e7DCd3e8a31C89Ff199833Da6",
    "userId": "715573876"
  }
}