{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "558452493",
    "entityType": "User",
    "nonce": "0x0fa49cb353d3f77ed46f16cc38192689626d0dbd706db42e8d659a4c2471f32e",
    "signature": "0x001e59711f00e585b93ea0cef83fab73ece1022746968672665ef12372ba096f484b1b87ec93916e8fd44aace12e917d8df4bd3f9ea58dd51ac0f5416600b0ac1b",
    "signer": "0x16D3bf5a80bAfFB2f1550d49b1203D4CA532DA1C",
    "userId": "1994482"
  }
}