{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "502706041",
    "entityType": "User",
    "nonce": "0x8fc3fd3ed37e78e91132a4b439946d0e8d2be334c94748bb7382e7be05e62aed",
    "signature": "0x28c75add54a10bcc50794915201cbc959829dd03d9f46400985bdab51a09f45341c8599b276e9b3dbb231e568c9c1fbb41cd075b1997a04ef2dc39fdeb9799451c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}