{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "750186075",
    "entityType": "User",
    "nonce": "0x76aab3af51a4badd8cd66e01982e9b08de1a650e762227e53b4b7ff794fe52d6",
    "signature": "0xd3450f96853e3f143fc9c573356defff261083ad26baf9fe968e7a2ff53a64947a6e746ae325939a7b0145e00c509d62146e5f42d9fe233ad8961500be0798b91c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}