{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "875378857",
    "entityType": "User",
    "nonce": "0x7a03682a332e55f80a7555f5f9a85d4e426d2ac0775ca6c43a8f62586ff95638",
    "signature": "0x3995879eff072c7760738dc6c7fb7c9396b4bc3c575665a197c08e7677f4c312273c943495eb05a53dbf95e7c6b7eb46d34373610aa47d7d741ad294f729d5751c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}