{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "154378",
    "entityType": "User",
    "nonce": "0x4e4b2799ebd6fe30c1ff246c7ee7d05f792f476071460eeaac0534a7f25f6f98",
    "signature": "0xbe88b410bccfcda78d4b12cb2a69fae72e948edeef84a6306f94fea991cdb784215ab7659145b8c7886bb7835b0b1e3ee17466533d50cd6550c1545375959a401b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}