{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4a1929ad3f38277bf9779ad2f9dab22876242075d15de6f50861ee897c410938",
    "signature": "0x1bf881fd1a191032a28f58098133c55b32edfa54dcf0d89a5ebd38c21ef9cbf1038aa5b3c32f92e1bf6ec125a7ce354c69470c9a6ae739458465169fa7ae4fd31c",
    "signer": "0x4391C746E11181B87164C3C6DcB2EA773D749ECD",
    "userId": "729432364"
  }
}