{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1450501",
    "entityType": "User",
    "nonce": "0x0b4316bc1c1c142fa528e0c9505615aba725b22fd42f00149dd33935c6180734",
    "signature": "0x394a7981470fd2905a9398bf74a9420f0c5966b3545b27f85a686efbc07790e254e51843afdce88c4ef4c9f103b601ecb68108c0ce17e2c8b103b44b6b8359061c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}