{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x88b1f02828d052da1bec78fab9b34f8225cbe06429ad88d30420fd02473e8ff8",
    "signature": "0x47d2675851440b4afa07eeb48c2dc43f0a2e330f4b21b1e730bbcf7958f9389f0d7298d9ef188a38b014480d4c5640b3ad799fdac2d3a9006fe0fd1d019e14561c",
    "signer": "0xB90003df339139E8859c42e5B01FeeD18Bbd7CB2",
    "userId": "766266881"
  }
}